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marcus.erl |
#ifndef _LINUX_SCHED_H
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#define _LINUX_SCHED_H
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/*
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* cloning flags:
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*/
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#define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
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#define CLONE_VM 0x00000100 /* set if VM shared between processes */
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#define CLONE_FS 0x00000200 /* set if fs info shared between processes */
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#define CLONE_FILES 0x00000400 /* set if open files shared between processes */
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#define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
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#define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
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#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
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#define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
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#define CLONE_THREAD 0x00010000 /* Same thread group? */
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#define CLONE_NEWNS 0x00020000 /* New namespace group? */
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#define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
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#define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
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#define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
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#define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
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#define CLONE_DETACHED 0x00400000 /* Unused, ignored */
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#define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
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#define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
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#define CLONE_STOPPED 0x02000000 /* Start in stopped state */
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#define CLONE_NEWUTS 0x04000000 /* New utsname group? */
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#define CLONE_NEWIPC 0x08000000 /* New ipcs */
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#define CLONE_NEWUSER 0x10000000 /* New user namespace */
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#define CLONE_NEWPID 0x20000000 /* New pid namespace */
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#define CLONE_NEWNET 0x40000000 /* New network namespace */
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/*
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* Scheduling policies
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*/
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#define SCHED_NORMAL 0
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#define SCHED_FIFO 1
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#define SCHED_RR 2
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#define SCHED_BATCH 3
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/* SCHED_ISO: reserved but not implemented yet */
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#define SCHED_IDLE 5
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#ifdef __KERNEL__
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struct sched_param {
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int sched_priority;
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};
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#include <asm/param.h> /* for HZ */
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#include <linux/capability.h>
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#include <linux/threads.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/timex.h>
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#include <linux/jiffies.h>
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#include <linux/rbtree.h>
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#include <linux/thread_info.h>
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#include <linux/cpumask.h>
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#include <linux/errno.h>
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#include <linux/nodemask.h>
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#include <linux/mm_types.h>
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#include <asm/system.h>
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#include <asm/semaphore.h>
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#include <asm/page.h>
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#include <asm/ptrace.h>
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#include <asm/cputime.h>
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#include <linux/smp.h>
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#include <linux/sem.h>
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#include <linux/signal.h>
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#include <linux/securebits.h>
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#include <linux/fs_struct.h>
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#include <linux/compiler.h>
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#include <linux/completion.h>
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#include <linux/pid.h>
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#include <linux/percpu.h>
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#include <linux/topology.h>
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#include <linux/proportions.h>
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#include <linux/seccomp.h>
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#include <linux/rcupdate.h>
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#include <linux/futex.h>
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#include <linux/rtmutex.h>
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#include <linux/time.h>
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#include <linux/param.h>
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#include <linux/resource.h>
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#include <linux/timer.h>
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#include <linux/hrtimer.h>
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#include <linux/task_io_accounting.h>
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#include <linux/kobject.h>
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#include <asm/processor.h>
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struct exec_domain;
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struct futex_pi_state;
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struct bio;
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/*
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* List of flags we want to share for kernel threads,
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* if only because they are not used by them anyway.
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*/
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#define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
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/*
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* These are the constant used to fake the fixed-point load-average
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* counting. Some notes:
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* - 11 bit fractions expand to 22 bits by the multiplies: this gives
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* a load-average precision of 10 bits integer + 11 bits fractional
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* - if you want to count load-averages more often, you need more
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* precision, or rounding will get you. With 2-second counting freq,
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* the EXP_n values would be 1981, 2034 and 2043 if still using only
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* 11 bit fractions.
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*/
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extern unsigned long avenrun[]; /* Load averages */
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#define FSHIFT 11 /* nr of bits of precision */
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#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
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#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
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#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
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#define EXP_5 2014 /* 1/exp(5sec/5min) */
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#define EXP_15 2037 /* 1/exp(5sec/15min) */
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#define CALC_LOAD(load,exp,n) \
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load *= exp; \
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load += n*(FIXED_1-exp); \
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load >>= FSHIFT;
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extern unsigned long total_forks;
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extern int nr_threads;
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DECLARE_PER_CPU(unsigned long, process_counts);
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extern int nr_processes(void);
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extern unsigned long nr_running(void);
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extern unsigned long nr_uninterruptible(void);
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extern unsigned long nr_active(void);
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extern unsigned long nr_iowait(void);
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extern unsigned long weighted_cpuload(const int cpu);
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struct seq_file;
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struct cfs_rq;
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struct task_group;
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#ifdef CONFIG_SCHED_DEBUG
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extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
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extern void proc_sched_set_task(struct task_struct *p);
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extern void
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print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
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#else
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static inline void
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proc_sched_show_task(struct task_struct *p, struct seq_file *m)
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{
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}
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static inline void proc_sched_set_task(struct task_struct *p)
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{
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}
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static inline void
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print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
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{
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}
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#endif
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/*
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* Task state bitmask. NOTE! These bits are also
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* encoded in fs/proc/array.c: get_task_state().
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*
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* We have two separate sets of flags: task->state
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* is about runnability, while task->exit_state are
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* about the task exiting. Confusing, but this way
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* modifying one set can't modify the other one by
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* mistake.
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*/
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#define TASK_RUNNING 0
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#define TASK_INTERRUPTIBLE 1
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#define TASK_UNINTERRUPTIBLE 2
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#define TASK_STOPPED 4
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#define TASK_TRACED 8
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/* in tsk->exit_state */
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#define EXIT_ZOMBIE 16
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#define EXIT_DEAD 32
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/* in tsk->state again */
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#define TASK_DEAD 64
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#define __set_task_state(tsk, state_value) \
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do { (tsk)->state = (state_value); } while (0)
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#define set_task_state(tsk, state_value) \
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set_mb((tsk)->state, (state_value))
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/*
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* set_current_state() includes a barrier so that the write of current->state
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* is correctly serialised wrt the caller's subsequent test of whether to
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* actually sleep:
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*
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* set_current_state(TASK_UNINTERRUPTIBLE);
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* if (do_i_need_to_sleep())
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* schedule();
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*
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* If the caller does not need such serialisation then use __set_current_state()
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*/
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#define __set_current_state(state_value) \
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do { current->state = (state_value); } while (0)
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#define set_current_state(state_value) \
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set_mb(current->state, (state_value))
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/* Task command name length */
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#define TASK_COMM_LEN 16
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#include <linux/spinlock.h>
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/*
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* This serializes "schedule()" and also protects
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* the run-queue from deletions/modifications (but
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* _adding_ to the beginning of the run-queue has
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* a separate lock).
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*/
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extern rwlock_t tasklist_lock;
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extern spinlock_t mmlist_lock;
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struct task_struct;
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extern void sched_init(void);
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extern void sched_init_smp(void);
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extern void init_idle(struct task_struct *idle, int cpu);
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extern void init_idle_bootup_task(struct task_struct *idle);
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extern cpumask_t nohz_cpu_mask;
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#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
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extern int select_nohz_load_balancer(int cpu);
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#else
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static inline int select_nohz_load_balancer(int cpu)
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{
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return 0;
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}
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#endif
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/*
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* Only dump TASK_* tasks. (0 for all tasks)
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*/
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extern void show_state_filter(unsigned long state_filter);
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static inline void show_state(void)
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{
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show_state_filter(0);
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}
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extern void show_regs(struct pt_regs *);
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/*
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* TASK is a pointer to the task whose backtrace we want to see (or NULL for current
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* task), SP is the stack pointer of the first frame that should be shown in the back
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* trace (or NULL if the entire call-chain of the task should be shown).
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*/
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extern void show_stack(struct task_struct *task, unsigned long *sp);
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void io_schedule(void);
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long io_schedule_timeout(long timeout);
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extern void cpu_init (void);
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extern void trap_init(void);
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extern void account_process_tick(struct task_struct *task, int user);
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extern void update_process_times(int user);
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extern void scheduler_tick(void);
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#ifdef CONFIG_DETECT_SOFTLOCKUP
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extern void softlockup_tick(void);
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extern void spawn_softlockup_task(void);
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extern void touch_softlockup_watchdog(void);
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extern void touch_all_softlockup_watchdogs(void);
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extern int softlockup_thresh;
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#else
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static inline void softlockup_tick(void)
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{
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}
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static inline void spawn_softlockup_task(void)
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{
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}
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static inline void touch_softlockup_watchdog(void)
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{
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}
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static inline void touch_all_softlockup_watchdogs(void)
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{
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}
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#endif
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/* Attach to any functions which should be ignored in wchan output. */
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#define __sched __attribute__((__section__(".sched.text")))
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286 |
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/* Linker adds these: start and end of __sched functions */
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extern char __sched_text_start[], __sched_text_end[];
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289 |
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/* Is this address in the __sched functions? */
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extern int in_sched_functions(unsigned long addr);
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291 |
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#define MAX_SCHEDULE_TIMEOUT LONG_MAX
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293 |
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extern signed long FASTCALL(schedule_timeout(signed long timeout));
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294 |
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extern signed long schedule_timeout_interruptible(signed long timeout);
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295 |
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extern signed long schedule_timeout_uninterruptible(signed long timeout);
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296 |
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asmlinkage void schedule(void);
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297 |
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298 |
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struct nsproxy;
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299 |
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struct user_namespace;
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300 |
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301 |
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/* Maximum number of active map areas.. This is a random (large) number */
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302 |
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#define DEFAULT_MAX_MAP_COUNT 65536
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303 |
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304 |
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extern int sysctl_max_map_count;
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#include <linux/aio.h>
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308 |
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extern unsigned long
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309 |
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arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
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310 |
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unsigned long, unsigned long);
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311 |
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extern unsigned long
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312 |
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arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
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313 |
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unsigned long len, unsigned long pgoff,
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314 |
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unsigned long flags);
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315 |
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extern void arch_unmap_area(struct mm_struct *, unsigned long);
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316 |
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extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
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317 |
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318 |
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#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
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/*
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320 |
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* The mm counters are not protected by its page_table_lock,
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321 |
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* so must be incremented atomically.
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*/
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#define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
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#define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
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#define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
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#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
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#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
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329 |
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#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
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330 |
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/*
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331 |
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* The mm counters are protected by its page_table_lock,
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332 |
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* so can be incremented directly.
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333 |
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*/
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334 |
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#define set_mm_counter(mm, member, value) (mm)->_##member = (value)
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335 |
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#define get_mm_counter(mm, member) ((mm)->_##member)
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336 |
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#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
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337 |
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#define inc_mm_counter(mm, member) (mm)->_##member++
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338 |
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#define dec_mm_counter(mm, member) (mm)->_##member--
|
339 |
|
|
|
340 |
|
|
#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
|
341 |
|
|
|
342 |
|
|
#define get_mm_rss(mm) \
|
343 |
|
|
(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
|
344 |
|
|
#define update_hiwater_rss(mm) do { \
|
345 |
|
|
unsigned long _rss = get_mm_rss(mm); \
|
346 |
|
|
if ((mm)->hiwater_rss < _rss) \
|
347 |
|
|
(mm)->hiwater_rss = _rss; \
|
348 |
|
|
} while (0)
|
349 |
|
|
#define update_hiwater_vm(mm) do { \
|
350 |
|
|
if ((mm)->hiwater_vm < (mm)->total_vm) \
|
351 |
|
|
(mm)->hiwater_vm = (mm)->total_vm; \
|
352 |
|
|
} while (0)
|
353 |
|
|
|
354 |
|
|
extern void set_dumpable(struct mm_struct *mm, int value);
|
355 |
|
|
extern int get_dumpable(struct mm_struct *mm);
|
356 |
|
|
|
357 |
|
|
/* mm flags */
|
358 |
|
|
/* dumpable bits */
|
359 |
|
|
#define MMF_DUMPABLE 0 /* core dump is permitted */
|
360 |
|
|
#define MMF_DUMP_SECURELY 1 /* core file is readable only by root */
|
361 |
|
|
#define MMF_DUMPABLE_BITS 2
|
362 |
|
|
|
363 |
|
|
/* coredump filter bits */
|
364 |
|
|
#define MMF_DUMP_ANON_PRIVATE 2
|
365 |
|
|
#define MMF_DUMP_ANON_SHARED 3
|
366 |
|
|
#define MMF_DUMP_MAPPED_PRIVATE 4
|
367 |
|
|
#define MMF_DUMP_MAPPED_SHARED 5
|
368 |
|
|
#define MMF_DUMP_ELF_HEADERS 6
|
369 |
|
|
#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
|
370 |
|
|
#define MMF_DUMP_FILTER_BITS 5
|
371 |
|
|
#define MMF_DUMP_FILTER_MASK \
|
372 |
|
|
(((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
|
373 |
|
|
#define MMF_DUMP_FILTER_DEFAULT \
|
374 |
|
|
((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED))
|
375 |
|
|
|
376 |
|
|
struct sighand_struct {
|
377 |
|
|
atomic_t count;
|
378 |
|
|
struct k_sigaction action[_NSIG];
|
379 |
|
|
spinlock_t siglock;
|
380 |
|
|
wait_queue_head_t signalfd_wqh;
|
381 |
|
|
};
|
382 |
|
|
|
383 |
|
|
struct pacct_struct {
|
384 |
|
|
int ac_flag;
|
385 |
|
|
long ac_exitcode;
|
386 |
|
|
unsigned long ac_mem;
|
387 |
|
|
cputime_t ac_utime, ac_stime;
|
388 |
|
|
unsigned long ac_minflt, ac_majflt;
|
389 |
|
|
};
|
390 |
|
|
|
391 |
|
|
/*
|
392 |
|
|
* NOTE! "signal_struct" does not have it's own
|
393 |
|
|
* locking, because a shared signal_struct always
|
394 |
|
|
* implies a shared sighand_struct, so locking
|
395 |
|
|
* sighand_struct is always a proper superset of
|
396 |
|
|
* the locking of signal_struct.
|
397 |
|
|
*/
|
398 |
|
|
struct signal_struct {
|
399 |
|
|
atomic_t count;
|
400 |
|
|
atomic_t live;
|
401 |
|
|
|
402 |
|
|
wait_queue_head_t wait_chldexit; /* for wait4() */
|
403 |
|
|
|
404 |
|
|
/* current thread group signal load-balancing target: */
|
405 |
|
|
struct task_struct *curr_target;
|
406 |
|
|
|
407 |
|
|
/* shared signal handling: */
|
408 |
|
|
struct sigpending shared_pending;
|
409 |
|
|
|
410 |
|
|
/* thread group exit support */
|
411 |
|
|
int group_exit_code;
|
412 |
|
|
/* overloaded:
|
413 |
|
|
* - notify group_exit_task when ->count is equal to notify_count
|
414 |
|
|
* - everyone except group_exit_task is stopped during signal delivery
|
415 |
|
|
* of fatal signals, group_exit_task processes the signal.
|
416 |
|
|
*/
|
417 |
|
|
struct task_struct *group_exit_task;
|
418 |
|
|
int notify_count;
|
419 |
|
|
|
420 |
|
|
/* thread group stop support, overloads group_exit_code too */
|
421 |
|
|
int group_stop_count;
|
422 |
|
|
unsigned int flags; /* see SIGNAL_* flags below */
|
423 |
|
|
|
424 |
|
|
/* POSIX.1b Interval Timers */
|
425 |
|
|
struct list_head posix_timers;
|
426 |
|
|
|
427 |
|
|
/* ITIMER_REAL timer for the process */
|
428 |
|
|
struct hrtimer real_timer;
|
429 |
|
|
struct task_struct *tsk;
|
430 |
|
|
ktime_t it_real_incr;
|
431 |
|
|
|
432 |
|
|
/* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
|
433 |
|
|
cputime_t it_prof_expires, it_virt_expires;
|
434 |
|
|
cputime_t it_prof_incr, it_virt_incr;
|
435 |
|
|
|
436 |
|
|
/* job control IDs */
|
437 |
|
|
|
438 |
|
|
/*
|
439 |
|
|
* pgrp and session fields are deprecated.
|
440 |
|
|
* use the task_session_Xnr and task_pgrp_Xnr routines below
|
441 |
|
|
*/
|
442 |
|
|
|
443 |
|
|
union {
|
444 |
|
|
pid_t pgrp __deprecated;
|
445 |
|
|
pid_t __pgrp;
|
446 |
|
|
};
|
447 |
|
|
|
448 |
|
|
struct pid *tty_old_pgrp;
|
449 |
|
|
|
450 |
|
|
union {
|
451 |
|
|
pid_t session __deprecated;
|
452 |
|
|
pid_t __session;
|
453 |
|
|
};
|
454 |
|
|
|
455 |
|
|
/* boolean value for session group leader */
|
456 |
|
|
int leader;
|
457 |
|
|
|
458 |
|
|
struct tty_struct *tty; /* NULL if no tty */
|
459 |
|
|
|
460 |
|
|
/*
|
461 |
|
|
* Cumulative resource counters for dead threads in the group,
|
462 |
|
|
* and for reaped dead child processes forked by this group.
|
463 |
|
|
* Live threads maintain their own counters and add to these
|
464 |
|
|
* in __exit_signal, except for the group leader.
|
465 |
|
|
*/
|
466 |
|
|
cputime_t utime, stime, cutime, cstime;
|
467 |
|
|
cputime_t gtime;
|
468 |
|
|
cputime_t cgtime;
|
469 |
|
|
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
|
470 |
|
|
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
|
471 |
|
|
unsigned long inblock, oublock, cinblock, coublock;
|
472 |
|
|
|
473 |
|
|
/*
|
474 |
|
|
* Cumulative ns of scheduled CPU time for dead threads in the
|
475 |
|
|
* group, not including a zombie group leader. (This only differs
|
476 |
|
|
* from jiffies_to_ns(utime + stime) if sched_clock uses something
|
477 |
|
|
* other than jiffies.)
|
478 |
|
|
*/
|
479 |
|
|
unsigned long long sum_sched_runtime;
|
480 |
|
|
|
481 |
|
|
/*
|
482 |
|
|
* We don't bother to synchronize most readers of this at all,
|
483 |
|
|
* because there is no reader checking a limit that actually needs
|
484 |
|
|
* to get both rlim_cur and rlim_max atomically, and either one
|
485 |
|
|
* alone is a single word that can safely be read normally.
|
486 |
|
|
* getrlimit/setrlimit use task_lock(current->group_leader) to
|
487 |
|
|
* protect this instead of the siglock, because they really
|
488 |
|
|
* have no need to disable irqs.
|
489 |
|
|
*/
|
490 |
|
|
struct rlimit rlim[RLIM_NLIMITS];
|
491 |
|
|
|
492 |
|
|
struct list_head cpu_timers[3];
|
493 |
|
|
|
494 |
|
|
/* keep the process-shared keyrings here so that they do the right
|
495 |
|
|
* thing in threads created with CLONE_THREAD */
|
496 |
|
|
#ifdef CONFIG_KEYS
|
497 |
|
|
struct key *session_keyring; /* keyring inherited over fork */
|
498 |
|
|
struct key *process_keyring; /* keyring private to this process */
|
499 |
|
|
#endif
|
500 |
|
|
#ifdef CONFIG_BSD_PROCESS_ACCT
|
501 |
|
|
struct pacct_struct pacct; /* per-process accounting information */
|
502 |
|
|
#endif
|
503 |
|
|
#ifdef CONFIG_TASKSTATS
|
504 |
|
|
struct taskstats *stats;
|
505 |
|
|
#endif
|
506 |
|
|
#ifdef CONFIG_AUDIT
|
507 |
|
|
unsigned audit_tty;
|
508 |
|
|
struct tty_audit_buf *tty_audit_buf;
|
509 |
|
|
#endif
|
510 |
|
|
};
|
511 |
|
|
|
512 |
|
|
/* Context switch must be unlocked if interrupts are to be enabled */
|
513 |
|
|
#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
|
514 |
|
|
# define __ARCH_WANT_UNLOCKED_CTXSW
|
515 |
|
|
#endif
|
516 |
|
|
|
517 |
|
|
/*
|
518 |
|
|
* Bits in flags field of signal_struct.
|
519 |
|
|
*/
|
520 |
|
|
#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
|
521 |
|
|
#define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
|
522 |
|
|
#define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
|
523 |
|
|
#define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
|
524 |
|
|
|
525 |
|
|
/*
|
526 |
|
|
* Some day this will be a full-fledged user tracking system..
|
527 |
|
|
*/
|
528 |
|
|
struct user_struct {
|
529 |
|
|
atomic_t __count; /* reference count */
|
530 |
|
|
atomic_t processes; /* How many processes does this user have? */
|
531 |
|
|
atomic_t files; /* How many open files does this user have? */
|
532 |
|
|
atomic_t sigpending; /* How many pending signals does this user have? */
|
533 |
|
|
#ifdef CONFIG_INOTIFY_USER
|
534 |
|
|
atomic_t inotify_watches; /* How many inotify watches does this user have? */
|
535 |
|
|
atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
|
536 |
|
|
#endif
|
537 |
|
|
#ifdef CONFIG_POSIX_MQUEUE
|
538 |
|
|
/* protected by mq_lock */
|
539 |
|
|
unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
|
540 |
|
|
#endif
|
541 |
|
|
unsigned long locked_shm; /* How many pages of mlocked shm ? */
|
542 |
|
|
|
543 |
|
|
#ifdef CONFIG_KEYS
|
544 |
|
|
struct key *uid_keyring; /* UID specific keyring */
|
545 |
|
|
struct key *session_keyring; /* UID's default session keyring */
|
546 |
|
|
#endif
|
547 |
|
|
|
548 |
|
|
/* Hash table maintenance information */
|
549 |
|
|
struct hlist_node uidhash_node;
|
550 |
|
|
uid_t uid;
|
551 |
|
|
|
552 |
|
|
#ifdef CONFIG_FAIR_USER_SCHED
|
553 |
|
|
struct task_group *tg;
|
554 |
|
|
#ifdef CONFIG_SYSFS
|
555 |
|
|
struct kset kset;
|
556 |
|
|
struct subsys_attribute user_attr;
|
557 |
|
|
struct work_struct work;
|
558 |
|
|
#endif
|
559 |
|
|
#endif
|
560 |
|
|
};
|
561 |
|
|
|
562 |
|
|
#ifdef CONFIG_FAIR_USER_SCHED
|
563 |
|
|
extern int uids_kobject_init(void);
|
564 |
|
|
#else
|
565 |
|
|
static inline int uids_kobject_init(void) { return 0; }
|
566 |
|
|
#endif
|
567 |
|
|
|
568 |
|
|
extern struct user_struct *find_user(uid_t);
|
569 |
|
|
|
570 |
|
|
extern struct user_struct root_user;
|
571 |
|
|
#define INIT_USER (&root_user)
|
572 |
|
|
|
573 |
|
|
struct backing_dev_info;
|
574 |
|
|
struct reclaim_state;
|
575 |
|
|
|
576 |
|
|
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
|
577 |
|
|
struct sched_info {
|
578 |
|
|
/* cumulative counters */
|
579 |
|
|
unsigned long pcount; /* # of times run on this cpu */
|
580 |
|
|
unsigned long long cpu_time, /* time spent on the cpu */
|
581 |
|
|
run_delay; /* time spent waiting on a runqueue */
|
582 |
|
|
|
583 |
|
|
/* timestamps */
|
584 |
|
|
unsigned long long last_arrival,/* when we last ran on a cpu */
|
585 |
|
|
last_queued; /* when we were last queued to run */
|
586 |
|
|
#ifdef CONFIG_SCHEDSTATS
|
587 |
|
|
/* BKL stats */
|
588 |
|
|
unsigned int bkl_count;
|
589 |
|
|
#endif
|
590 |
|
|
};
|
591 |
|
|
#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
|
592 |
|
|
|
593 |
|
|
#ifdef CONFIG_SCHEDSTATS
|
594 |
|
|
extern const struct file_operations proc_schedstat_operations;
|
595 |
|
|
#endif /* CONFIG_SCHEDSTATS */
|
596 |
|
|
|
597 |
|
|
#ifdef CONFIG_TASK_DELAY_ACCT
|
598 |
|
|
struct task_delay_info {
|
599 |
|
|
spinlock_t lock;
|
600 |
|
|
unsigned int flags; /* Private per-task flags */
|
601 |
|
|
|
602 |
|
|
/* For each stat XXX, add following, aligned appropriately
|
603 |
|
|
*
|
604 |
|
|
* struct timespec XXX_start, XXX_end;
|
605 |
|
|
* u64 XXX_delay;
|
606 |
|
|
* u32 XXX_count;
|
607 |
|
|
*
|
608 |
|
|
* Atomicity of updates to XXX_delay, XXX_count protected by
|
609 |
|
|
* single lock above (split into XXX_lock if contention is an issue).
|
610 |
|
|
*/
|
611 |
|
|
|
612 |
|
|
/*
|
613 |
|
|
* XXX_count is incremented on every XXX operation, the delay
|
614 |
|
|
* associated with the operation is added to XXX_delay.
|
615 |
|
|
* XXX_delay contains the accumulated delay time in nanoseconds.
|
616 |
|
|
*/
|
617 |
|
|
struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */
|
618 |
|
|
u64 blkio_delay; /* wait for sync block io completion */
|
619 |
|
|
u64 swapin_delay; /* wait for swapin block io completion */
|
620 |
|
|
u32 blkio_count; /* total count of the number of sync block */
|
621 |
|
|
/* io operations performed */
|
622 |
|
|
u32 swapin_count; /* total count of the number of swapin block */
|
623 |
|
|
/* io operations performed */
|
624 |
|
|
};
|
625 |
|
|
#endif /* CONFIG_TASK_DELAY_ACCT */
|
626 |
|
|
|
627 |
|
|
static inline int sched_info_on(void)
|
628 |
|
|
{
|
629 |
|
|
#ifdef CONFIG_SCHEDSTATS
|
630 |
|
|
return 1;
|
631 |
|
|
#elif defined(CONFIG_TASK_DELAY_ACCT)
|
632 |
|
|
extern int delayacct_on;
|
633 |
|
|
return delayacct_on;
|
634 |
|
|
#else
|
635 |
|
|
return 0;
|
636 |
|
|
#endif
|
637 |
|
|
}
|
638 |
|
|
|
639 |
|
|
enum cpu_idle_type {
|
640 |
|
|
CPU_IDLE,
|
641 |
|
|
CPU_NOT_IDLE,
|
642 |
|
|
CPU_NEWLY_IDLE,
|
643 |
|
|
CPU_MAX_IDLE_TYPES
|
644 |
|
|
};
|
645 |
|
|
|
646 |
|
|
/*
|
647 |
|
|
* sched-domains (multiprocessor balancing) declarations:
|
648 |
|
|
*/
|
649 |
|
|
|
650 |
|
|
/*
|
651 |
|
|
* Increase resolution of nice-level calculations:
|
652 |
|
|
*/
|
653 |
|
|
#define SCHED_LOAD_SHIFT 10
|
654 |
|
|
#define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
|
655 |
|
|
|
656 |
|
|
#define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE
|
657 |
|
|
|
658 |
|
|
#ifdef CONFIG_SMP
|
659 |
|
|
#define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
|
660 |
|
|
#define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
|
661 |
|
|
#define SD_BALANCE_EXEC 4 /* Balance on exec */
|
662 |
|
|
#define SD_BALANCE_FORK 8 /* Balance on fork, clone */
|
663 |
|
|
#define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
|
664 |
|
|
#define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
|
665 |
|
|
#define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
|
666 |
|
|
#define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
|
667 |
|
|
#define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */
|
668 |
|
|
#define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */
|
669 |
|
|
#define SD_SERIALIZE 1024 /* Only a single load balancing instance */
|
670 |
|
|
|
671 |
|
|
#define BALANCE_FOR_MC_POWER \
|
672 |
|
|
(sched_smt_power_savings ? SD_POWERSAVINGS_BALANCE : 0)
|
673 |
|
|
|
674 |
|
|
#define BALANCE_FOR_PKG_POWER \
|
675 |
|
|
((sched_mc_power_savings || sched_smt_power_savings) ? \
|
676 |
|
|
SD_POWERSAVINGS_BALANCE : 0)
|
677 |
|
|
|
678 |
|
|
#define test_sd_parent(sd, flag) ((sd->parent && \
|
679 |
|
|
(sd->parent->flags & flag)) ? 1 : 0)
|
680 |
|
|
|
681 |
|
|
|
682 |
|
|
struct sched_group {
|
683 |
|
|
struct sched_group *next; /* Must be a circular list */
|
684 |
|
|
cpumask_t cpumask;
|
685 |
|
|
|
686 |
|
|
/*
|
687 |
|
|
* CPU power of this group, SCHED_LOAD_SCALE being max power for a
|
688 |
|
|
* single CPU. This is read only (except for setup, hotplug CPU).
|
689 |
|
|
* Note : Never change cpu_power without recompute its reciprocal
|
690 |
|
|
*/
|
691 |
|
|
unsigned int __cpu_power;
|
692 |
|
|
/*
|
693 |
|
|
* reciprocal value of cpu_power to avoid expensive divides
|
694 |
|
|
* (see include/linux/reciprocal_div.h)
|
695 |
|
|
*/
|
696 |
|
|
u32 reciprocal_cpu_power;
|
697 |
|
|
};
|
698 |
|
|
|
699 |
|
|
struct sched_domain {
|
700 |
|
|
/* These fields must be setup */
|
701 |
|
|
struct sched_domain *parent; /* top domain must be null terminated */
|
702 |
|
|
struct sched_domain *child; /* bottom domain must be null terminated */
|
703 |
|
|
struct sched_group *groups; /* the balancing groups of the domain */
|
704 |
|
|
cpumask_t span; /* span of all CPUs in this domain */
|
705 |
|
|
unsigned long min_interval; /* Minimum balance interval ms */
|
706 |
|
|
unsigned long max_interval; /* Maximum balance interval ms */
|
707 |
|
|
unsigned int busy_factor; /* less balancing by factor if busy */
|
708 |
|
|
unsigned int imbalance_pct; /* No balance until over watermark */
|
709 |
|
|
unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
|
710 |
|
|
unsigned int busy_idx;
|
711 |
|
|
unsigned int idle_idx;
|
712 |
|
|
unsigned int newidle_idx;
|
713 |
|
|
unsigned int wake_idx;
|
714 |
|
|
unsigned int forkexec_idx;
|
715 |
|
|
int flags; /* See SD_* */
|
716 |
|
|
|
717 |
|
|
/* Runtime fields. */
|
718 |
|
|
unsigned long last_balance; /* init to jiffies. units in jiffies */
|
719 |
|
|
unsigned int balance_interval; /* initialise to 1. units in ms. */
|
720 |
|
|
unsigned int nr_balance_failed; /* initialise to 0 */
|
721 |
|
|
|
722 |
|
|
#ifdef CONFIG_SCHEDSTATS
|
723 |
|
|
/* load_balance() stats */
|
724 |
|
|
unsigned int lb_count[CPU_MAX_IDLE_TYPES];
|
725 |
|
|
unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
|
726 |
|
|
unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
|
727 |
|
|
unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
|
728 |
|
|
unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
|
729 |
|
|
unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
|
730 |
|
|
unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
|
731 |
|
|
unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
|
732 |
|
|
|
733 |
|
|
/* Active load balancing */
|
734 |
|
|
unsigned int alb_count;
|
735 |
|
|
unsigned int alb_failed;
|
736 |
|
|
unsigned int alb_pushed;
|
737 |
|
|
|
738 |
|
|
/* SD_BALANCE_EXEC stats */
|
739 |
|
|
unsigned int sbe_count;
|
740 |
|
|
unsigned int sbe_balanced;
|
741 |
|
|
unsigned int sbe_pushed;
|
742 |
|
|
|
743 |
|
|
/* SD_BALANCE_FORK stats */
|
744 |
|
|
unsigned int sbf_count;
|
745 |
|
|
unsigned int sbf_balanced;
|
746 |
|
|
unsigned int sbf_pushed;
|
747 |
|
|
|
748 |
|
|
/* try_to_wake_up() stats */
|
749 |
|
|
unsigned int ttwu_wake_remote;
|
750 |
|
|
unsigned int ttwu_move_affine;
|
751 |
|
|
unsigned int ttwu_move_balance;
|
752 |
|
|
#endif
|
753 |
|
|
};
|
754 |
|
|
|
755 |
|
|
extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new);
|
756 |
|
|
|
757 |
|
|
#endif /* CONFIG_SMP */
|
758 |
|
|
|
759 |
|
|
/*
|
760 |
|
|
* A runqueue laden with a single nice 0 task scores a weighted_cpuload of
|
761 |
|
|
* SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
|
762 |
|
|
* task of nice 0 or enough lower priority tasks to bring up the
|
763 |
|
|
* weighted_cpuload
|
764 |
|
|
*/
|
765 |
|
|
static inline int above_background_load(void)
|
766 |
|
|
{
|
767 |
|
|
unsigned long cpu;
|
768 |
|
|
|
769 |
|
|
for_each_online_cpu(cpu) {
|
770 |
|
|
if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE)
|
771 |
|
|
return 1;
|
772 |
|
|
}
|
773 |
|
|
return 0;
|
774 |
|
|
}
|
775 |
|
|
|
776 |
|
|
struct io_context; /* See blkdev.h */
|
777 |
|
|
#define NGROUPS_SMALL 32
|
778 |
|
|
#define NGROUPS_PER_BLOCK ((int)(PAGE_SIZE / sizeof(gid_t)))
|
779 |
|
|
struct group_info {
|
780 |
|
|
int ngroups;
|
781 |
|
|
atomic_t usage;
|
782 |
|
|
gid_t small_block[NGROUPS_SMALL];
|
783 |
|
|
int nblocks;
|
784 |
|
|
gid_t *blocks[0];
|
785 |
|
|
};
|
786 |
|
|
|
787 |
|
|
/*
|
788 |
|
|
* get_group_info() must be called with the owning task locked (via task_lock())
|
789 |
|
|
* when task != current. The reason being that the vast majority of callers are
|
790 |
|
|
* looking at current->group_info, which can not be changed except by the
|
791 |
|
|
* current task. Changing current->group_info requires the task lock, too.
|
792 |
|
|
*/
|
793 |
|
|
#define get_group_info(group_info) do { \
|
794 |
|
|
atomic_inc(&(group_info)->usage); \
|
795 |
|
|
} while (0)
|
796 |
|
|
|
797 |
|
|
#define put_group_info(group_info) do { \
|
798 |
|
|
if (atomic_dec_and_test(&(group_info)->usage)) \
|
799 |
|
|
groups_free(group_info); \
|
800 |
|
|
} while (0)
|
801 |
|
|
|
802 |
|
|
extern struct group_info *groups_alloc(int gidsetsize);
|
803 |
|
|
extern void groups_free(struct group_info *group_info);
|
804 |
|
|
extern int set_current_groups(struct group_info *group_info);
|
805 |
|
|
extern int groups_search(struct group_info *group_info, gid_t grp);
|
806 |
|
|
/* access the groups "array" with this macro */
|
807 |
|
|
#define GROUP_AT(gi, i) \
|
808 |
|
|
((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
|
809 |
|
|
|
810 |
|
|
#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
|
811 |
|
|
extern void prefetch_stack(struct task_struct *t);
|
812 |
|
|
#else
|
813 |
|
|
static inline void prefetch_stack(struct task_struct *t) { }
|
814 |
|
|
#endif
|
815 |
|
|
|
816 |
|
|
struct audit_context; /* See audit.c */
|
817 |
|
|
struct mempolicy;
|
818 |
|
|
struct pipe_inode_info;
|
819 |
|
|
struct uts_namespace;
|
820 |
|
|
|
821 |
|
|
struct rq;
|
822 |
|
|
struct sched_domain;
|
823 |
|
|
|
824 |
|
|
struct sched_class {
|
825 |
|
|
const struct sched_class *next;
|
826 |
|
|
|
827 |
|
|
void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup);
|
828 |
|
|
void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep);
|
829 |
|
|
void (*yield_task) (struct rq *rq);
|
830 |
|
|
|
831 |
|
|
void (*check_preempt_curr) (struct rq *rq, struct task_struct *p);
|
832 |
|
|
|
833 |
|
|
struct task_struct * (*pick_next_task) (struct rq *rq);
|
834 |
|
|
void (*put_prev_task) (struct rq *rq, struct task_struct *p);
|
835 |
|
|
|
836 |
|
|
#ifdef CONFIG_SMP
|
837 |
|
|
unsigned long (*load_balance) (struct rq *this_rq, int this_cpu,
|
838 |
|
|
struct rq *busiest, unsigned long max_load_move,
|
839 |
|
|
struct sched_domain *sd, enum cpu_idle_type idle,
|
840 |
|
|
int *all_pinned, int *this_best_prio);
|
841 |
|
|
|
842 |
|
|
int (*move_one_task) (struct rq *this_rq, int this_cpu,
|
843 |
|
|
struct rq *busiest, struct sched_domain *sd,
|
844 |
|
|
enum cpu_idle_type idle);
|
845 |
|
|
#endif
|
846 |
|
|
|
847 |
|
|
void (*set_curr_task) (struct rq *rq);
|
848 |
|
|
void (*task_tick) (struct rq *rq, struct task_struct *p);
|
849 |
|
|
void (*task_new) (struct rq *rq, struct task_struct *p);
|
850 |
|
|
};
|
851 |
|
|
|
852 |
|
|
struct load_weight {
|
853 |
|
|
unsigned long weight, inv_weight;
|
854 |
|
|
};
|
855 |
|
|
|
856 |
|
|
/*
|
857 |
|
|
* CFS stats for a schedulable entity (task, task-group etc)
|
858 |
|
|
*
|
859 |
|
|
* Current field usage histogram:
|
860 |
|
|
*
|
861 |
|
|
* 4 se->block_start
|
862 |
|
|
* 4 se->run_node
|
863 |
|
|
* 4 se->sleep_start
|
864 |
|
|
* 6 se->load.weight
|
865 |
|
|
*/
|
866 |
|
|
struct sched_entity {
|
867 |
|
|
struct load_weight load; /* for load-balancing */
|
868 |
|
|
struct rb_node run_node;
|
869 |
|
|
unsigned int on_rq;
|
870 |
|
|
|
871 |
|
|
u64 exec_start;
|
872 |
|
|
u64 sum_exec_runtime;
|
873 |
|
|
u64 vruntime;
|
874 |
|
|
u64 prev_sum_exec_runtime;
|
875 |
|
|
|
876 |
|
|
#ifdef CONFIG_SCHEDSTATS
|
877 |
|
|
u64 wait_start;
|
878 |
|
|
u64 wait_max;
|
879 |
|
|
|
880 |
|
|
u64 sleep_start;
|
881 |
|
|
u64 sleep_max;
|
882 |
|
|
s64 sum_sleep_runtime;
|
883 |
|
|
|
884 |
|
|
u64 block_start;
|
885 |
|
|
u64 block_max;
|
886 |
|
|
u64 exec_max;
|
887 |
|
|
u64 slice_max;
|
888 |
|
|
|
889 |
|
|
u64 nr_migrations;
|
890 |
|
|
u64 nr_migrations_cold;
|
891 |
|
|
u64 nr_failed_migrations_affine;
|
892 |
|
|
u64 nr_failed_migrations_running;
|
893 |
|
|
u64 nr_failed_migrations_hot;
|
894 |
|
|
u64 nr_forced_migrations;
|
895 |
|
|
u64 nr_forced2_migrations;
|
896 |
|
|
|
897 |
|
|
u64 nr_wakeups;
|
898 |
|
|
u64 nr_wakeups_sync;
|
899 |
|
|
u64 nr_wakeups_migrate;
|
900 |
|
|
u64 nr_wakeups_local;
|
901 |
|
|
u64 nr_wakeups_remote;
|
902 |
|
|
u64 nr_wakeups_affine;
|
903 |
|
|
u64 nr_wakeups_affine_attempts;
|
904 |
|
|
u64 nr_wakeups_passive;
|
905 |
|
|
u64 nr_wakeups_idle;
|
906 |
|
|
#endif
|
907 |
|
|
|
908 |
|
|
#ifdef CONFIG_FAIR_GROUP_SCHED
|
909 |
|
|
struct sched_entity *parent;
|
910 |
|
|
/* rq on which this entity is (to be) queued: */
|
911 |
|
|
struct cfs_rq *cfs_rq;
|
912 |
|
|
/* rq "owned" by this entity/group: */
|
913 |
|
|
struct cfs_rq *my_q;
|
914 |
|
|
#endif
|
915 |
|
|
};
|
916 |
|
|
|
917 |
|
|
struct task_struct {
|
918 |
|
|
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
|
919 |
|
|
void *stack;
|
920 |
|
|
atomic_t usage;
|
921 |
|
|
unsigned int flags; /* per process flags, defined below */
|
922 |
|
|
unsigned int ptrace;
|
923 |
|
|
|
924 |
|
|
int lock_depth; /* BKL lock depth */
|
925 |
|
|
|
926 |
|
|
#ifdef CONFIG_SMP
|
927 |
|
|
#ifdef __ARCH_WANT_UNLOCKED_CTXSW
|
928 |
|
|
int oncpu;
|
929 |
|
|
#endif
|
930 |
|
|
#endif
|
931 |
|
|
|
932 |
|
|
int prio, static_prio, normal_prio;
|
933 |
|
|
struct list_head run_list;
|
934 |
|
|
const struct sched_class *sched_class;
|
935 |
|
|
struct sched_entity se;
|
936 |
|
|
|
937 |
|
|
#ifdef CONFIG_PREEMPT_NOTIFIERS
|
938 |
|
|
/* list of struct preempt_notifier: */
|
939 |
|
|
struct hlist_head preempt_notifiers;
|
940 |
|
|
#endif
|
941 |
|
|
|
942 |
|
|
unsigned short ioprio;
|
943 |
|
|
/*
|
944 |
|
|
* fpu_counter contains the number of consecutive context switches
|
945 |
|
|
* that the FPU is used. If this is over a threshold, the lazy fpu
|
946 |
|
|
* saving becomes unlazy to save the trap. This is an unsigned char
|
947 |
|
|
* so that after 256 times the counter wraps and the behavior turns
|
948 |
|
|
* lazy again; this to deal with bursty apps that only use FPU for
|
949 |
|
|
* a short time
|
950 |
|
|
*/
|
951 |
|
|
unsigned char fpu_counter;
|
952 |
|
|
s8 oomkilladj; /* OOM kill score adjustment (bit shift). */
|
953 |
|
|
#ifdef CONFIG_BLK_DEV_IO_TRACE
|
954 |
|
|
unsigned int btrace_seq;
|
955 |
|
|
#endif
|
956 |
|
|
|
957 |
|
|
unsigned int policy;
|
958 |
|
|
cpumask_t cpus_allowed;
|
959 |
|
|
unsigned int time_slice;
|
960 |
|
|
|
961 |
|
|
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
|
962 |
|
|
struct sched_info sched_info;
|
963 |
|
|
#endif
|
964 |
|
|
|
965 |
|
|
struct list_head tasks;
|
966 |
|
|
/*
|
967 |
|
|
* ptrace_list/ptrace_children forms the list of my children
|
968 |
|
|
* that were stolen by a ptracer.
|
969 |
|
|
*/
|
970 |
|
|
struct list_head ptrace_children;
|
971 |
|
|
struct list_head ptrace_list;
|
972 |
|
|
|
973 |
|
|
struct mm_struct *mm, *active_mm;
|
974 |
|
|
|
975 |
|
|
/* task state */
|
976 |
|
|
struct linux_binfmt *binfmt;
|
977 |
|
|
int exit_state;
|
978 |
|
|
int exit_code, exit_signal;
|
979 |
|
|
int pdeath_signal; /* The signal sent when the parent dies */
|
980 |
|
|
/* ??? */
|
981 |
|
|
unsigned int personality;
|
982 |
|
|
unsigned did_exec:1;
|
983 |
|
|
pid_t pid;
|
984 |
|
|
pid_t tgid;
|
985 |
|
|
|
986 |
|
|
#ifdef CONFIG_CC_STACKPROTECTOR
|
987 |
|
|
/* Canary value for the -fstack-protector gcc feature */
|
988 |
|
|
unsigned long stack_canary;
|
989 |
|
|
#endif
|
990 |
|
|
/*
|
991 |
|
|
* pointers to (original) parent process, youngest child, younger sibling,
|
992 |
|
|
* older sibling, respectively. (p->father can be replaced with
|
993 |
|
|
* p->parent->pid)
|
994 |
|
|
*/
|
995 |
|
|
struct task_struct *real_parent; /* real parent process (when being debugged) */
|
996 |
|
|
struct task_struct *parent; /* parent process */
|
997 |
|
|
/*
|
998 |
|
|
* children/sibling forms the list of my children plus the
|
999 |
|
|
* tasks I'm ptracing.
|
1000 |
|
|
*/
|
1001 |
|
|
struct list_head children; /* list of my children */
|
1002 |
|
|
struct list_head sibling; /* linkage in my parent's children list */
|
1003 |
|
|
struct task_struct *group_leader; /* threadgroup leader */
|
1004 |
|
|
|
1005 |
|
|
/* PID/PID hash table linkage. */
|
1006 |
|
|
struct pid_link pids[PIDTYPE_MAX];
|
1007 |
|
|
struct list_head thread_group;
|
1008 |
|
|
|
1009 |
|
|
struct completion *vfork_done; /* for vfork() */
|
1010 |
|
|
int __user *set_child_tid; /* CLONE_CHILD_SETTID */
|
1011 |
|
|
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
|
1012 |
|
|
|
1013 |
|
|
unsigned int rt_priority;
|
1014 |
|
|
cputime_t utime, stime, utimescaled, stimescaled;
|
1015 |
|
|
cputime_t gtime;
|
1016 |
|
|
cputime_t prev_utime, prev_stime;
|
1017 |
|
|
unsigned long nvcsw, nivcsw; /* context switch counts */
|
1018 |
|
|
struct timespec start_time; /* monotonic time */
|
1019 |
|
|
struct timespec real_start_time; /* boot based time */
|
1020 |
|
|
/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
|
1021 |
|
|
unsigned long min_flt, maj_flt;
|
1022 |
|
|
|
1023 |
|
|
cputime_t it_prof_expires, it_virt_expires;
|
1024 |
|
|
unsigned long long it_sched_expires;
|
1025 |
|
|
struct list_head cpu_timers[3];
|
1026 |
|
|
|
1027 |
|
|
/* process credentials */
|
1028 |
|
|
uid_t uid,euid,suid,fsuid;
|
1029 |
|
|
gid_t gid,egid,sgid,fsgid;
|
1030 |
|
|
struct group_info *group_info;
|
1031 |
|
|
kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
|
1032 |
|
|
unsigned keep_capabilities:1;
|
1033 |
|
|
struct user_struct *user;
|
1034 |
|
|
#ifdef CONFIG_KEYS
|
1035 |
|
|
struct key *request_key_auth; /* assumed request_key authority */
|
1036 |
|
|
struct key *thread_keyring; /* keyring private to this thread */
|
1037 |
|
|
unsigned char jit_keyring; /* default keyring to attach requested keys to */
|
1038 |
|
|
#endif
|
1039 |
|
|
char comm[TASK_COMM_LEN]; /* executable name excluding path
|
1040 |
|
|
- access with [gs]et_task_comm (which lock
|
1041 |
|
|
it with task_lock())
|
1042 |
|
|
- initialized normally by flush_old_exec */
|
1043 |
|
|
/* file system info */
|
1044 |
|
|
int link_count, total_link_count;
|
1045 |
|
|
#ifdef CONFIG_SYSVIPC
|
1046 |
|
|
/* ipc stuff */
|
1047 |
|
|
struct sysv_sem sysvsem;
|
1048 |
|
|
#endif
|
1049 |
|
|
/* CPU-specific state of this task */
|
1050 |
|
|
struct thread_struct thread;
|
1051 |
|
|
/* filesystem information */
|
1052 |
|
|
struct fs_struct *fs;
|
1053 |
|
|
/* open file information */
|
1054 |
|
|
struct files_struct *files;
|
1055 |
|
|
/* namespaces */
|
1056 |
|
|
struct nsproxy *nsproxy;
|
1057 |
|
|
/* signal handlers */
|
1058 |
|
|
struct signal_struct *signal;
|
1059 |
|
|
struct sighand_struct *sighand;
|
1060 |
|
|
|
1061 |
|
|
sigset_t blocked, real_blocked;
|
1062 |
|
|
sigset_t saved_sigmask; /* To be restored with TIF_RESTORE_SIGMASK */
|
1063 |
|
|
struct sigpending pending;
|
1064 |
|
|
|
1065 |
|
|
unsigned long sas_ss_sp;
|
1066 |
|
|
size_t sas_ss_size;
|
1067 |
|
|
int (*notifier)(void *priv);
|
1068 |
|
|
void *notifier_data;
|
1069 |
|
|
sigset_t *notifier_mask;
|
1070 |
|
|
#ifdef CONFIG_SECURITY
|
1071 |
|
|
void *security;
|
1072 |
|
|
#endif
|
1073 |
|
|
struct audit_context *audit_context;
|
1074 |
|
|
seccomp_t seccomp;
|
1075 |
|
|
|
1076 |
|
|
/* Thread group tracking */
|
1077 |
|
|
u32 parent_exec_id;
|
1078 |
|
|
u32 self_exec_id;
|
1079 |
|
|
/* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
|
1080 |
|
|
spinlock_t alloc_lock;
|
1081 |
|
|
|
1082 |
|
|
/* Protection of the PI data structures: */
|
1083 |
|
|
spinlock_t pi_lock;
|
1084 |
|
|
|
1085 |
|
|
#ifdef CONFIG_RT_MUTEXES
|
1086 |
|
|
/* PI waiters blocked on a rt_mutex held by this task */
|
1087 |
|
|
struct plist_head pi_waiters;
|
1088 |
|
|
/* Deadlock detection and priority inheritance handling */
|
1089 |
|
|
struct rt_mutex_waiter *pi_blocked_on;
|
1090 |
|
|
#endif
|
1091 |
|
|
|
1092 |
|
|
#ifdef CONFIG_DEBUG_MUTEXES
|
1093 |
|
|
/* mutex deadlock detection */
|
1094 |
|
|
struct mutex_waiter *blocked_on;
|
1095 |
|
|
#endif
|
1096 |
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
1097 |
|
|
unsigned int irq_events;
|
1098 |
|
|
int hardirqs_enabled;
|
1099 |
|
|
unsigned long hardirq_enable_ip;
|
1100 |
|
|
unsigned int hardirq_enable_event;
|
1101 |
|
|
unsigned long hardirq_disable_ip;
|
1102 |
|
|
unsigned int hardirq_disable_event;
|
1103 |
|
|
int softirqs_enabled;
|
1104 |
|
|
unsigned long softirq_disable_ip;
|
1105 |
|
|
unsigned int softirq_disable_event;
|
1106 |
|
|
unsigned long softirq_enable_ip;
|
1107 |
|
|
unsigned int softirq_enable_event;
|
1108 |
|
|
int hardirq_context;
|
1109 |
|
|
int softirq_context;
|
1110 |
|
|
#endif
|
1111 |
|
|
#ifdef CONFIG_LOCKDEP
|
1112 |
82 |
tac2 |
# define MAX_LOCK_DEPTH 48UL
|
1113 |
62 |
marcus.erl |
u64 curr_chain_key;
|
1114 |
|
|
int lockdep_depth;
|
1115 |
|
|
struct held_lock held_locks[MAX_LOCK_DEPTH];
|
1116 |
|
|
unsigned int lockdep_recursion;
|
1117 |
|
|
#endif
|
1118 |
|
|
|
1119 |
|
|
/* journalling filesystem info */
|
1120 |
|
|
void *journal_info;
|
1121 |
|
|
|
1122 |
|
|
/* stacked block device info */
|
1123 |
|
|
struct bio *bio_list, **bio_tail;
|
1124 |
|
|
|
1125 |
|
|
/* VM state */
|
1126 |
|
|
struct reclaim_state *reclaim_state;
|
1127 |
|
|
|
1128 |
|
|
struct backing_dev_info *backing_dev_info;
|
1129 |
|
|
|
1130 |
|
|
struct io_context *io_context;
|
1131 |
|
|
|
1132 |
|
|
unsigned long ptrace_message;
|
1133 |
|
|
siginfo_t *last_siginfo; /* For ptrace use. */
|
1134 |
|
|
#ifdef CONFIG_TASK_XACCT
|
1135 |
|
|
/* i/o counters(bytes read/written, #syscalls */
|
1136 |
|
|
u64 rchar, wchar, syscr, syscw;
|
1137 |
|
|
#endif
|
1138 |
|
|
struct task_io_accounting ioac;
|
1139 |
|
|
#if defined(CONFIG_TASK_XACCT)
|
1140 |
|
|
u64 acct_rss_mem1; /* accumulated rss usage */
|
1141 |
|
|
u64 acct_vm_mem1; /* accumulated virtual memory usage */
|
1142 |
|
|
cputime_t acct_stimexpd;/* stime since last update */
|
1143 |
|
|
#endif
|
1144 |
|
|
#ifdef CONFIG_NUMA
|
1145 |
|
|
struct mempolicy *mempolicy;
|
1146 |
|
|
short il_next;
|
1147 |
|
|
#endif
|
1148 |
|
|
#ifdef CONFIG_CPUSETS
|
1149 |
|
|
nodemask_t mems_allowed;
|
1150 |
|
|
int cpuset_mems_generation;
|
1151 |
|
|
int cpuset_mem_spread_rotor;
|
1152 |
|
|
#endif
|
1153 |
|
|
#ifdef CONFIG_CGROUPS
|
1154 |
|
|
/* Control Group info protected by css_set_lock */
|
1155 |
|
|
struct css_set *cgroups;
|
1156 |
|
|
/* cg_list protected by css_set_lock and tsk->alloc_lock */
|
1157 |
|
|
struct list_head cg_list;
|
1158 |
|
|
#endif
|
1159 |
|
|
#ifdef CONFIG_FUTEX
|
1160 |
|
|
struct robust_list_head __user *robust_list;
|
1161 |
|
|
#ifdef CONFIG_COMPAT
|
1162 |
|
|
struct compat_robust_list_head __user *compat_robust_list;
|
1163 |
|
|
#endif
|
1164 |
|
|
struct list_head pi_state_list;
|
1165 |
|
|
struct futex_pi_state *pi_state_cache;
|
1166 |
|
|
#endif
|
1167 |
|
|
atomic_t fs_excl; /* holding fs exclusive resources */
|
1168 |
|
|
struct rcu_head rcu;
|
1169 |
|
|
|
1170 |
|
|
/*
|
1171 |
|
|
* cache last used pipe for splice
|
1172 |
|
|
*/
|
1173 |
|
|
struct pipe_inode_info *splice_pipe;
|
1174 |
|
|
#ifdef CONFIG_TASK_DELAY_ACCT
|
1175 |
|
|
struct task_delay_info *delays;
|
1176 |
|
|
#endif
|
1177 |
|
|
#ifdef CONFIG_FAULT_INJECTION
|
1178 |
|
|
int make_it_fail;
|
1179 |
|
|
#endif
|
1180 |
|
|
struct prop_local_single dirties;
|
1181 |
|
|
};
|
1182 |
|
|
|
1183 |
|
|
/*
|
1184 |
|
|
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
|
1185 |
|
|
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
|
1186 |
|
|
* tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
|
1187 |
|
|
* values are inverted: lower p->prio value means higher priority.
|
1188 |
|
|
*
|
1189 |
|
|
* The MAX_USER_RT_PRIO value allows the actual maximum
|
1190 |
|
|
* RT priority to be separate from the value exported to
|
1191 |
|
|
* user-space. This allows kernel threads to set their
|
1192 |
|
|
* priority to a value higher than any user task. Note:
|
1193 |
|
|
* MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
|
1194 |
|
|
*/
|
1195 |
|
|
|
1196 |
|
|
#define MAX_USER_RT_PRIO 100
|
1197 |
|
|
#define MAX_RT_PRIO MAX_USER_RT_PRIO
|
1198 |
|
|
|
1199 |
|
|
#define MAX_PRIO (MAX_RT_PRIO + 40)
|
1200 |
|
|
#define DEFAULT_PRIO (MAX_RT_PRIO + 20)
|
1201 |
|
|
|
1202 |
|
|
static inline int rt_prio(int prio)
|
1203 |
|
|
{
|
1204 |
|
|
if (unlikely(prio < MAX_RT_PRIO))
|
1205 |
|
|
return 1;
|
1206 |
|
|
return 0;
|
1207 |
|
|
}
|
1208 |
|
|
|
1209 |
|
|
static inline int rt_task(struct task_struct *p)
|
1210 |
|
|
{
|
1211 |
|
|
return rt_prio(p->prio);
|
1212 |
|
|
}
|
1213 |
|
|
|
1214 |
|
|
static inline void set_task_session(struct task_struct *tsk, pid_t session)
|
1215 |
|
|
{
|
1216 |
|
|
tsk->signal->__session = session;
|
1217 |
|
|
}
|
1218 |
|
|
|
1219 |
|
|
static inline void set_task_pgrp(struct task_struct *tsk, pid_t pgrp)
|
1220 |
|
|
{
|
1221 |
|
|
tsk->signal->__pgrp = pgrp;
|
1222 |
|
|
}
|
1223 |
|
|
|
1224 |
|
|
static inline struct pid *task_pid(struct task_struct *task)
|
1225 |
|
|
{
|
1226 |
|
|
return task->pids[PIDTYPE_PID].pid;
|
1227 |
|
|
}
|
1228 |
|
|
|
1229 |
|
|
static inline struct pid *task_tgid(struct task_struct *task)
|
1230 |
|
|
{
|
1231 |
|
|
return task->group_leader->pids[PIDTYPE_PID].pid;
|
1232 |
|
|
}
|
1233 |
|
|
|
1234 |
|
|
static inline struct pid *task_pgrp(struct task_struct *task)
|
1235 |
|
|
{
|
1236 |
|
|
return task->group_leader->pids[PIDTYPE_PGID].pid;
|
1237 |
|
|
}
|
1238 |
|
|
|
1239 |
|
|
static inline struct pid *task_session(struct task_struct *task)
|
1240 |
|
|
{
|
1241 |
|
|
return task->group_leader->pids[PIDTYPE_SID].pid;
|
1242 |
|
|
}
|
1243 |
|
|
|
1244 |
|
|
struct pid_namespace;
|
1245 |
|
|
|
1246 |
|
|
/*
|
1247 |
|
|
* the helpers to get the task's different pids as they are seen
|
1248 |
|
|
* from various namespaces
|
1249 |
|
|
*
|
1250 |
|
|
* task_xid_nr() : global id, i.e. the id seen from the init namespace;
|
1251 |
|
|
* task_xid_vnr() : virtual id, i.e. the id seen from the namespace the task
|
1252 |
|
|
* belongs to. this only makes sence when called in the
|
1253 |
|
|
* context of the task that belongs to the same namespace;
|
1254 |
|
|
* task_xid_nr_ns() : id seen from the ns specified;
|
1255 |
|
|
*
|
1256 |
|
|
* set_task_vxid() : assigns a virtual id to a task;
|
1257 |
|
|
*
|
1258 |
|
|
* see also pid_nr() etc in include/linux/pid.h
|
1259 |
|
|
*/
|
1260 |
|
|
|
1261 |
|
|
static inline pid_t task_pid_nr(struct task_struct *tsk)
|
1262 |
|
|
{
|
1263 |
|
|
return tsk->pid;
|
1264 |
|
|
}
|
1265 |
|
|
|
1266 |
|
|
pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
|
1267 |
|
|
|
1268 |
|
|
static inline pid_t task_pid_vnr(struct task_struct *tsk)
|
1269 |
|
|
{
|
1270 |
|
|
return pid_vnr(task_pid(tsk));
|
1271 |
|
|
}
|
1272 |
|
|
|
1273 |
|
|
|
1274 |
|
|
static inline pid_t task_tgid_nr(struct task_struct *tsk)
|
1275 |
|
|
{
|
1276 |
|
|
return tsk->tgid;
|
1277 |
|
|
}
|
1278 |
|
|
|
1279 |
|
|
pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
|
1280 |
|
|
|
1281 |
|
|
static inline pid_t task_tgid_vnr(struct task_struct *tsk)
|
1282 |
|
|
{
|
1283 |
|
|
return pid_vnr(task_tgid(tsk));
|
1284 |
|
|
}
|
1285 |
|
|
|
1286 |
|
|
|
1287 |
|
|
static inline pid_t task_pgrp_nr(struct task_struct *tsk)
|
1288 |
|
|
{
|
1289 |
|
|
return tsk->signal->__pgrp;
|
1290 |
|
|
}
|
1291 |
|
|
|
1292 |
|
|
pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
|
1293 |
|
|
|
1294 |
|
|
static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
|
1295 |
|
|
{
|
1296 |
|
|
return pid_vnr(task_pgrp(tsk));
|
1297 |
|
|
}
|
1298 |
|
|
|
1299 |
|
|
|
1300 |
|
|
static inline pid_t task_session_nr(struct task_struct *tsk)
|
1301 |
|
|
{
|
1302 |
|
|
return tsk->signal->__session;
|
1303 |
|
|
}
|
1304 |
|
|
|
1305 |
|
|
pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
|
1306 |
|
|
|
1307 |
|
|
static inline pid_t task_session_vnr(struct task_struct *tsk)
|
1308 |
|
|
{
|
1309 |
|
|
return pid_vnr(task_session(tsk));
|
1310 |
|
|
}
|
1311 |
|
|
|
1312 |
|
|
|
1313 |
|
|
/**
|
1314 |
|
|
* pid_alive - check that a task structure is not stale
|
1315 |
|
|
* @p: Task structure to be checked.
|
1316 |
|
|
*
|
1317 |
|
|
* Test if a process is not yet dead (at most zombie state)
|
1318 |
|
|
* If pid_alive fails, then pointers within the task structure
|
1319 |
|
|
* can be stale and must not be dereferenced.
|
1320 |
|
|
*/
|
1321 |
|
|
static inline int pid_alive(struct task_struct *p)
|
1322 |
|
|
{
|
1323 |
|
|
return p->pids[PIDTYPE_PID].pid != NULL;
|
1324 |
|
|
}
|
1325 |
|
|
|
1326 |
|
|
/**
|
1327 |
|
|
* is_global_init - check if a task structure is init
|
1328 |
|
|
* @tsk: Task structure to be checked.
|
1329 |
|
|
*
|
1330 |
|
|
* Check if a task structure is the first user space task the kernel created.
|
1331 |
|
|
*/
|
1332 |
|
|
static inline int is_global_init(struct task_struct *tsk)
|
1333 |
|
|
{
|
1334 |
|
|
return tsk->pid == 1;
|
1335 |
|
|
}
|
1336 |
|
|
|
1337 |
|
|
/*
|
1338 |
|
|
* is_container_init:
|
1339 |
|
|
* check whether in the task is init in its own pid namespace.
|
1340 |
|
|
*/
|
1341 |
|
|
extern int is_container_init(struct task_struct *tsk);
|
1342 |
|
|
|
1343 |
|
|
extern struct pid *cad_pid;
|
1344 |
|
|
|
1345 |
|
|
extern void free_task(struct task_struct *tsk);
|
1346 |
|
|
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
|
1347 |
|
|
|
1348 |
|
|
extern void __put_task_struct(struct task_struct *t);
|
1349 |
|
|
|
1350 |
|
|
static inline void put_task_struct(struct task_struct *t)
|
1351 |
|
|
{
|
1352 |
|
|
if (atomic_dec_and_test(&t->usage))
|
1353 |
|
|
__put_task_struct(t);
|
1354 |
|
|
}
|
1355 |
|
|
|
1356 |
|
|
/*
|
1357 |
|
|
* Per process flags
|
1358 |
|
|
*/
|
1359 |
|
|
#define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
|
1360 |
|
|
/* Not implemented yet, only for 486*/
|
1361 |
|
|
#define PF_STARTING 0x00000002 /* being created */
|
1362 |
|
|
#define PF_EXITING 0x00000004 /* getting shut down */
|
1363 |
|
|
#define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */
|
1364 |
|
|
#define PF_VCPU 0x00000010 /* I'm a virtual CPU */
|
1365 |
|
|
#define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
|
1366 |
|
|
#define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
|
1367 |
|
|
#define PF_DUMPCORE 0x00000200 /* dumped core */
|
1368 |
|
|
#define PF_SIGNALED 0x00000400 /* killed by a signal */
|
1369 |
|
|
#define PF_MEMALLOC 0x00000800 /* Allocating memory */
|
1370 |
|
|
#define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
|
1371 |
|
|
#define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
|
1372 |
|
|
#define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
|
1373 |
|
|
#define PF_FROZEN 0x00010000 /* frozen for system suspend */
|
1374 |
|
|
#define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
|
1375 |
|
|
#define PF_KSWAPD 0x00040000 /* I am kswapd */
|
1376 |
|
|
#define PF_SWAPOFF 0x00080000 /* I am in swapoff */
|
1377 |
|
|
#define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
|
1378 |
|
|
#define PF_BORROWED_MM 0x00200000 /* I am a kthread doing use_mm */
|
1379 |
|
|
#define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
|
1380 |
|
|
#define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
|
1381 |
|
|
#define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
|
1382 |
|
|
#define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
|
1383 |
|
|
#define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
|
1384 |
|
|
#define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */
|
1385 |
|
|
#define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */
|
1386 |
|
|
|
1387 |
|
|
/*
|
1388 |
|
|
* Only the _current_ task can read/write to tsk->flags, but other
|
1389 |
|
|
* tasks can access tsk->flags in readonly mode for example
|
1390 |
|
|
* with tsk_used_math (like during threaded core dumping).
|
1391 |
|
|
* There is however an exception to this rule during ptrace
|
1392 |
|
|
* or during fork: the ptracer task is allowed to write to the
|
1393 |
|
|
* child->flags of its traced child (same goes for fork, the parent
|
1394 |
|
|
* can write to the child->flags), because we're guaranteed the
|
1395 |
|
|
* child is not running and in turn not changing child->flags
|
1396 |
|
|
* at the same time the parent does it.
|
1397 |
|
|
*/
|
1398 |
|
|
#define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
|
1399 |
|
|
#define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
|
1400 |
|
|
#define clear_used_math() clear_stopped_child_used_math(current)
|
1401 |
|
|
#define set_used_math() set_stopped_child_used_math(current)
|
1402 |
|
|
#define conditional_stopped_child_used_math(condition, child) \
|
1403 |
|
|
do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
|
1404 |
|
|
#define conditional_used_math(condition) \
|
1405 |
|
|
conditional_stopped_child_used_math(condition, current)
|
1406 |
|
|
#define copy_to_stopped_child_used_math(child) \
|
1407 |
|
|
do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
|
1408 |
|
|
/* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
|
1409 |
|
|
#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
|
1410 |
|
|
#define used_math() tsk_used_math(current)
|
1411 |
|
|
|
1412 |
|
|
#ifdef CONFIG_SMP
|
1413 |
|
|
extern int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask);
|
1414 |
|
|
#else
|
1415 |
|
|
static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
|
1416 |
|
|
{
|
1417 |
|
|
if (!cpu_isset(0, new_mask))
|
1418 |
|
|
return -EINVAL;
|
1419 |
|
|
return 0;
|
1420 |
|
|
}
|
1421 |
|
|
#endif
|
1422 |
|
|
|
1423 |
|
|
extern unsigned long long sched_clock(void);
|
1424 |
|
|
|
1425 |
|
|
/*
|
1426 |
|
|
* For kernel-internal use: high-speed (but slightly incorrect) per-cpu
|
1427 |
|
|
* clock constructed from sched_clock():
|
1428 |
|
|
*/
|
1429 |
|
|
extern unsigned long long cpu_clock(int cpu);
|
1430 |
|
|
|
1431 |
|
|
extern unsigned long long
|
1432 |
|
|
task_sched_runtime(struct task_struct *task);
|
1433 |
|
|
|
1434 |
|
|
/* sched_exec is called by processes performing an exec */
|
1435 |
|
|
#ifdef CONFIG_SMP
|
1436 |
|
|
extern void sched_exec(void);
|
1437 |
|
|
#else
|
1438 |
|
|
#define sched_exec() {}
|
1439 |
|
|
#endif
|
1440 |
|
|
|
1441 |
|
|
extern void sched_clock_idle_sleep_event(void);
|
1442 |
|
|
extern void sched_clock_idle_wakeup_event(u64 delta_ns);
|
1443 |
|
|
|
1444 |
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
1445 |
|
|
extern void idle_task_exit(void);
|
1446 |
|
|
#else
|
1447 |
|
|
static inline void idle_task_exit(void) {}
|
1448 |
|
|
#endif
|
1449 |
|
|
|
1450 |
|
|
extern void sched_idle_next(void);
|
1451 |
|
|
|
1452 |
|
|
#ifdef CONFIG_SCHED_DEBUG
|
1453 |
|
|
extern unsigned int sysctl_sched_latency;
|
1454 |
|
|
extern unsigned int sysctl_sched_min_granularity;
|
1455 |
|
|
extern unsigned int sysctl_sched_wakeup_granularity;
|
1456 |
|
|
extern unsigned int sysctl_sched_batch_wakeup_granularity;
|
1457 |
|
|
extern unsigned int sysctl_sched_child_runs_first;
|
1458 |
|
|
extern unsigned int sysctl_sched_features;
|
1459 |
|
|
extern unsigned int sysctl_sched_migration_cost;
|
1460 |
|
|
extern unsigned int sysctl_sched_nr_migrate;
|
1461 |
|
|
|
1462 |
|
|
int sched_nr_latency_handler(struct ctl_table *table, int write,
|
1463 |
|
|
struct file *file, void __user *buffer, size_t *length,
|
1464 |
|
|
loff_t *ppos);
|
1465 |
|
|
#endif
|
1466 |
|
|
|
1467 |
|
|
extern unsigned int sysctl_sched_compat_yield;
|
1468 |
|
|
|
1469 |
|
|
#ifdef CONFIG_RT_MUTEXES
|
1470 |
|
|
extern int rt_mutex_getprio(struct task_struct *p);
|
1471 |
|
|
extern void rt_mutex_setprio(struct task_struct *p, int prio);
|
1472 |
|
|
extern void rt_mutex_adjust_pi(struct task_struct *p);
|
1473 |
|
|
#else
|
1474 |
|
|
static inline int rt_mutex_getprio(struct task_struct *p)
|
1475 |
|
|
{
|
1476 |
|
|
return p->normal_prio;
|
1477 |
|
|
}
|
1478 |
|
|
# define rt_mutex_adjust_pi(p) do { } while (0)
|
1479 |
|
|
#endif
|
1480 |
|
|
|
1481 |
|
|
extern void set_user_nice(struct task_struct *p, long nice);
|
1482 |
|
|
extern int task_prio(const struct task_struct *p);
|
1483 |
|
|
extern int task_nice(const struct task_struct *p);
|
1484 |
|
|
extern int can_nice(const struct task_struct *p, const int nice);
|
1485 |
|
|
extern int task_curr(const struct task_struct *p);
|
1486 |
|
|
extern int idle_cpu(int cpu);
|
1487 |
|
|
extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
|
1488 |
|
|
extern struct task_struct *idle_task(int cpu);
|
1489 |
|
|
extern struct task_struct *curr_task(int cpu);
|
1490 |
|
|
extern void set_curr_task(int cpu, struct task_struct *p);
|
1491 |
|
|
|
1492 |
|
|
void yield(void);
|
1493 |
|
|
|
1494 |
|
|
/*
|
1495 |
|
|
* The default (Linux) execution domain.
|
1496 |
|
|
*/
|
1497 |
|
|
extern struct exec_domain default_exec_domain;
|
1498 |
|
|
|
1499 |
|
|
union thread_union {
|
1500 |
|
|
struct thread_info thread_info;
|
1501 |
|
|
unsigned long stack[THREAD_SIZE/sizeof(long)];
|
1502 |
|
|
};
|
1503 |
|
|
|
1504 |
|
|
#ifndef __HAVE_ARCH_KSTACK_END
|
1505 |
|
|
static inline int kstack_end(void *addr)
|
1506 |
|
|
{
|
1507 |
|
|
/* Reliable end of stack detection:
|
1508 |
|
|
* Some APM bios versions misalign the stack
|
1509 |
|
|
*/
|
1510 |
|
|
return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
|
1511 |
|
|
}
|
1512 |
|
|
#endif
|
1513 |
|
|
|
1514 |
|
|
extern union thread_union init_thread_union;
|
1515 |
|
|
extern struct task_struct init_task;
|
1516 |
|
|
|
1517 |
|
|
extern struct mm_struct init_mm;
|
1518 |
|
|
|
1519 |
|
|
extern struct pid_namespace init_pid_ns;
|
1520 |
|
|
|
1521 |
|
|
/*
|
1522 |
|
|
* find a task by one of its numerical ids
|
1523 |
|
|
*
|
1524 |
|
|
* find_task_by_pid_type_ns():
|
1525 |
|
|
* it is the most generic call - it finds a task by all id,
|
1526 |
|
|
* type and namespace specified
|
1527 |
|
|
* find_task_by_pid_ns():
|
1528 |
|
|
* finds a task by its pid in the specified namespace
|
1529 |
|
|
* find_task_by_vpid():
|
1530 |
|
|
* finds a task by its virtual pid
|
1531 |
|
|
* find_task_by_pid():
|
1532 |
|
|
* finds a task by its global pid
|
1533 |
|
|
*
|
1534 |
|
|
* see also find_pid() etc in include/linux/pid.h
|
1535 |
|
|
*/
|
1536 |
|
|
|
1537 |
|
|
extern struct task_struct *find_task_by_pid_type_ns(int type, int pid,
|
1538 |
|
|
struct pid_namespace *ns);
|
1539 |
|
|
|
1540 |
|
|
extern struct task_struct *find_task_by_pid(pid_t nr);
|
1541 |
|
|
extern struct task_struct *find_task_by_vpid(pid_t nr);
|
1542 |
|
|
extern struct task_struct *find_task_by_pid_ns(pid_t nr,
|
1543 |
|
|
struct pid_namespace *ns);
|
1544 |
|
|
|
1545 |
|
|
extern void __set_special_pids(pid_t session, pid_t pgrp);
|
1546 |
|
|
|
1547 |
|
|
/* per-UID process charging. */
|
1548 |
|
|
extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);
|
1549 |
|
|
static inline struct user_struct *get_uid(struct user_struct *u)
|
1550 |
|
|
{
|
1551 |
|
|
atomic_inc(&u->__count);
|
1552 |
|
|
return u;
|
1553 |
|
|
}
|
1554 |
|
|
extern void free_uid(struct user_struct *);
|
1555 |
|
|
extern void switch_uid(struct user_struct *);
|
1556 |
|
|
extern void release_uids(struct user_namespace *ns);
|
1557 |
|
|
|
1558 |
|
|
#include <asm/current.h>
|
1559 |
|
|
|
1560 |
|
|
extern void do_timer(unsigned long ticks);
|
1561 |
|
|
|
1562 |
|
|
extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
|
1563 |
|
|
extern int FASTCALL(wake_up_process(struct task_struct * tsk));
|
1564 |
|
|
extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
|
1565 |
|
|
unsigned long clone_flags));
|
1566 |
|
|
#ifdef CONFIG_SMP
|
1567 |
|
|
extern void kick_process(struct task_struct *tsk);
|
1568 |
|
|
#else
|
1569 |
|
|
static inline void kick_process(struct task_struct *tsk) { }
|
1570 |
|
|
#endif
|
1571 |
|
|
extern void sched_fork(struct task_struct *p, int clone_flags);
|
1572 |
|
|
extern void sched_dead(struct task_struct *p);
|
1573 |
|
|
|
1574 |
|
|
extern int in_group_p(gid_t);
|
1575 |
|
|
extern int in_egroup_p(gid_t);
|
1576 |
|
|
|
1577 |
|
|
extern void proc_caches_init(void);
|
1578 |
|
|
extern void flush_signals(struct task_struct *);
|
1579 |
|
|
extern void ignore_signals(struct task_struct *);
|
1580 |
|
|
extern void flush_signal_handlers(struct task_struct *, int force_default);
|
1581 |
|
|
extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
|
1582 |
|
|
|
1583 |
|
|
static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
|
1584 |
|
|
{
|
1585 |
|
|
unsigned long flags;
|
1586 |
|
|
int ret;
|
1587 |
|
|
|
1588 |
|
|
spin_lock_irqsave(&tsk->sighand->siglock, flags);
|
1589 |
|
|
ret = dequeue_signal(tsk, mask, info);
|
1590 |
|
|
spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
|
1591 |
|
|
|
1592 |
|
|
return ret;
|
1593 |
|
|
}
|
1594 |
|
|
|
1595 |
|
|
extern void block_all_signals(int (*notifier)(void *priv), void *priv,
|
1596 |
|
|
sigset_t *mask);
|
1597 |
|
|
extern void unblock_all_signals(void);
|
1598 |
|
|
extern void release_task(struct task_struct * p);
|
1599 |
|
|
extern int send_sig_info(int, struct siginfo *, struct task_struct *);
|
1600 |
|
|
extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);
|
1601 |
|
|
extern int force_sigsegv(int, struct task_struct *);
|
1602 |
|
|
extern int force_sig_info(int, struct siginfo *, struct task_struct *);
|
1603 |
|
|
extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
|
1604 |
|
|
extern int kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
|
1605 |
|
|
extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
|
1606 |
|
|
extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);
|
1607 |
|
|
extern int kill_pgrp(struct pid *pid, int sig, int priv);
|
1608 |
|
|
extern int kill_pid(struct pid *pid, int sig, int priv);
|
1609 |
|
|
extern int kill_proc_info(int, struct siginfo *, pid_t);
|
1610 |
|
|
extern void do_notify_parent(struct task_struct *, int);
|
1611 |
|
|
extern void force_sig(int, struct task_struct *);
|
1612 |
|
|
extern void force_sig_specific(int, struct task_struct *);
|
1613 |
|
|
extern int send_sig(int, struct task_struct *, int);
|
1614 |
|
|
extern void zap_other_threads(struct task_struct *p);
|
1615 |
|
|
extern int kill_proc(pid_t, int, int);
|
1616 |
|
|
extern struct sigqueue *sigqueue_alloc(void);
|
1617 |
|
|
extern void sigqueue_free(struct sigqueue *);
|
1618 |
|
|
extern int send_sigqueue(int, struct sigqueue *, struct task_struct *);
|
1619 |
|
|
extern int send_group_sigqueue(int, struct sigqueue *, struct task_struct *);
|
1620 |
|
|
extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
|
1621 |
|
|
extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
|
1622 |
|
|
|
1623 |
|
|
static inline int kill_cad_pid(int sig, int priv)
|
1624 |
|
|
{
|
1625 |
|
|
return kill_pid(cad_pid, sig, priv);
|
1626 |
|
|
}
|
1627 |
|
|
|
1628 |
|
|
/* These can be the second arg to send_sig_info/send_group_sig_info. */
|
1629 |
|
|
#define SEND_SIG_NOINFO ((struct siginfo *) 0)
|
1630 |
|
|
#define SEND_SIG_PRIV ((struct siginfo *) 1)
|
1631 |
|
|
#define SEND_SIG_FORCED ((struct siginfo *) 2)
|
1632 |
|
|
|
1633 |
|
|
static inline int is_si_special(const struct siginfo *info)
|
1634 |
|
|
{
|
1635 |
|
|
return info <= SEND_SIG_FORCED;
|
1636 |
|
|
}
|
1637 |
|
|
|
1638 |
|
|
/* True if we are on the alternate signal stack. */
|
1639 |
|
|
|
1640 |
|
|
static inline int on_sig_stack(unsigned long sp)
|
1641 |
|
|
{
|
1642 |
|
|
return (sp - current->sas_ss_sp < current->sas_ss_size);
|
1643 |
|
|
}
|
1644 |
|
|
|
1645 |
|
|
static inline int sas_ss_flags(unsigned long sp)
|
1646 |
|
|
{
|
1647 |
|
|
return (current->sas_ss_size == 0 ? SS_DISABLE
|
1648 |
|
|
: on_sig_stack(sp) ? SS_ONSTACK : 0);
|
1649 |
|
|
}
|
1650 |
|
|
|
1651 |
|
|
/*
|
1652 |
|
|
* Routines for handling mm_structs
|
1653 |
|
|
*/
|
1654 |
|
|
extern struct mm_struct * mm_alloc(void);
|
1655 |
|
|
|
1656 |
|
|
/* mmdrop drops the mm and the page tables */
|
1657 |
|
|
extern void FASTCALL(__mmdrop(struct mm_struct *));
|
1658 |
|
|
static inline void mmdrop(struct mm_struct * mm)
|
1659 |
|
|
{
|
1660 |
|
|
if (unlikely(atomic_dec_and_test(&mm->mm_count)))
|
1661 |
|
|
__mmdrop(mm);
|
1662 |
|
|
}
|
1663 |
|
|
|
1664 |
|
|
/* mmput gets rid of the mappings and all user-space */
|
1665 |
|
|
extern void mmput(struct mm_struct *);
|
1666 |
|
|
/* Grab a reference to a task's mm, if it is not already going away */
|
1667 |
|
|
extern struct mm_struct *get_task_mm(struct task_struct *task);
|
1668 |
|
|
/* Remove the current tasks stale references to the old mm_struct */
|
1669 |
|
|
extern void mm_release(struct task_struct *, struct mm_struct *);
|
1670 |
|
|
|
1671 |
|
|
extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
|
1672 |
|
|
extern void flush_thread(void);
|
1673 |
|
|
extern void exit_thread(void);
|
1674 |
|
|
|
1675 |
|
|
extern void exit_files(struct task_struct *);
|
1676 |
|
|
extern void __cleanup_signal(struct signal_struct *);
|
1677 |
|
|
extern void __cleanup_sighand(struct sighand_struct *);
|
1678 |
|
|
extern void exit_itimers(struct signal_struct *);
|
1679 |
|
|
|
1680 |
|
|
extern NORET_TYPE void do_group_exit(int);
|
1681 |
|
|
|
1682 |
|
|
extern void daemonize(const char *, ...);
|
1683 |
|
|
extern int allow_signal(int);
|
1684 |
|
|
extern int disallow_signal(int);
|
1685 |
|
|
|
1686 |
|
|
extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
|
1687 |
|
|
extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
|
1688 |
|
|
struct task_struct *fork_idle(int);
|
1689 |
|
|
|
1690 |
|
|
extern void set_task_comm(struct task_struct *tsk, char *from);
|
1691 |
|
|
extern void get_task_comm(char *to, struct task_struct *tsk);
|
1692 |
|
|
|
1693 |
|
|
#ifdef CONFIG_SMP
|
1694 |
|
|
extern void wait_task_inactive(struct task_struct * p);
|
1695 |
|
|
#else
|
1696 |
|
|
#define wait_task_inactive(p) do { } while (0)
|
1697 |
|
|
#endif
|
1698 |
|
|
|
1699 |
|
|
#define remove_parent(p) list_del_init(&(p)->sibling)
|
1700 |
|
|
#define add_parent(p) list_add_tail(&(p)->sibling,&(p)->parent->children)
|
1701 |
|
|
|
1702 |
|
|
#define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
|
1703 |
|
|
|
1704 |
|
|
#define for_each_process(p) \
|
1705 |
|
|
for (p = &init_task ; (p = next_task(p)) != &init_task ; )
|
1706 |
|
|
|
1707 |
|
|
/*
|
1708 |
|
|
* Careful: do_each_thread/while_each_thread is a double loop so
|
1709 |
|
|
* 'break' will not work as expected - use goto instead.
|
1710 |
|
|
*/
|
1711 |
|
|
#define do_each_thread(g, t) \
|
1712 |
|
|
for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
|
1713 |
|
|
|
1714 |
|
|
#define while_each_thread(g, t) \
|
1715 |
|
|
while ((t = next_thread(t)) != g)
|
1716 |
|
|
|
1717 |
|
|
/* de_thread depends on thread_group_leader not being a pid based check */
|
1718 |
|
|
#define thread_group_leader(p) (p == p->group_leader)
|
1719 |
|
|
|
1720 |
|
|
/* Do to the insanities of de_thread it is possible for a process
|
1721 |
|
|
* to have the pid of the thread group leader without actually being
|
1722 |
|
|
* the thread group leader. For iteration through the pids in proc
|
1723 |
|
|
* all we care about is that we have a task with the appropriate
|
1724 |
|
|
* pid, we don't actually care if we have the right task.
|
1725 |
|
|
*/
|
1726 |
|
|
static inline int has_group_leader_pid(struct task_struct *p)
|
1727 |
|
|
{
|
1728 |
|
|
return p->pid == p->tgid;
|
1729 |
|
|
}
|
1730 |
|
|
|
1731 |
|
|
static inline
|
1732 |
|
|
int same_thread_group(struct task_struct *p1, struct task_struct *p2)
|
1733 |
|
|
{
|
1734 |
|
|
return p1->tgid == p2->tgid;
|
1735 |
|
|
}
|
1736 |
|
|
|
1737 |
|
|
static inline struct task_struct *next_thread(const struct task_struct *p)
|
1738 |
|
|
{
|
1739 |
|
|
return list_entry(rcu_dereference(p->thread_group.next),
|
1740 |
|
|
struct task_struct, thread_group);
|
1741 |
|
|
}
|
1742 |
|
|
|
1743 |
|
|
static inline int thread_group_empty(struct task_struct *p)
|
1744 |
|
|
{
|
1745 |
|
|
return list_empty(&p->thread_group);
|
1746 |
|
|
}
|
1747 |
|
|
|
1748 |
|
|
#define delay_group_leader(p) \
|
1749 |
|
|
(thread_group_leader(p) && !thread_group_empty(p))
|
1750 |
|
|
|
1751 |
|
|
/*
|
1752 |
|
|
* Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
|
1753 |
|
|
* subscriptions and synchronises with wait4(). Also used in procfs. Also
|
1754 |
|
|
* pins the final release of task.io_context. Also protects ->cpuset and
|
1755 |
|
|
* ->cgroup.subsys[].
|
1756 |
|
|
*
|
1757 |
|
|
* Nests both inside and outside of read_lock(&tasklist_lock).
|
1758 |
|
|
* It must not be nested with write_lock_irq(&tasklist_lock),
|
1759 |
|
|
* neither inside nor outside.
|
1760 |
|
|
*/
|
1761 |
|
|
static inline void task_lock(struct task_struct *p)
|
1762 |
|
|
{
|
1763 |
|
|
spin_lock(&p->alloc_lock);
|
1764 |
|
|
}
|
1765 |
|
|
|
1766 |
|
|
static inline void task_unlock(struct task_struct *p)
|
1767 |
|
|
{
|
1768 |
|
|
spin_unlock(&p->alloc_lock);
|
1769 |
|
|
}
|
1770 |
|
|
|
1771 |
|
|
extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
|
1772 |
|
|
unsigned long *flags);
|
1773 |
|
|
|
1774 |
|
|
static inline void unlock_task_sighand(struct task_struct *tsk,
|
1775 |
|
|
unsigned long *flags)
|
1776 |
|
|
{
|
1777 |
|
|
spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
|
1778 |
|
|
}
|
1779 |
|
|
|
1780 |
|
|
#ifndef __HAVE_THREAD_FUNCTIONS
|
1781 |
|
|
|
1782 |
|
|
#define task_thread_info(task) ((struct thread_info *)(task)->stack)
|
1783 |
|
|
#define task_stack_page(task) ((task)->stack)
|
1784 |
|
|
|
1785 |
|
|
static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
|
1786 |
|
|
{
|
1787 |
|
|
*task_thread_info(p) = *task_thread_info(org);
|
1788 |
|
|
task_thread_info(p)->task = p;
|
1789 |
|
|
}
|
1790 |
|
|
|
1791 |
|
|
static inline unsigned long *end_of_stack(struct task_struct *p)
|
1792 |
|
|
{
|
1793 |
|
|
return (unsigned long *)(task_thread_info(p) + 1);
|
1794 |
|
|
}
|
1795 |
|
|
|
1796 |
|
|
#endif
|
1797 |
|
|
|
1798 |
|
|
/* set thread flags in other task's structures
|
1799 |
|
|
* - see asm/thread_info.h for TIF_xxxx flags available
|
1800 |
|
|
*/
|
1801 |
|
|
static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
|
1802 |
|
|
{
|
1803 |
|
|
set_ti_thread_flag(task_thread_info(tsk), flag);
|
1804 |
|
|
}
|
1805 |
|
|
|
1806 |
|
|
static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
|
1807 |
|
|
{
|
1808 |
|
|
clear_ti_thread_flag(task_thread_info(tsk), flag);
|
1809 |
|
|
}
|
1810 |
|
|
|
1811 |
|
|
static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
|
1812 |
|
|
{
|
1813 |
|
|
return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
|
1814 |
|
|
}
|
1815 |
|
|
|
1816 |
|
|
static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
|
1817 |
|
|
{
|
1818 |
|
|
return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
|
1819 |
|
|
}
|
1820 |
|
|
|
1821 |
|
|
static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
|
1822 |
|
|
{
|
1823 |
|
|
return test_ti_thread_flag(task_thread_info(tsk), flag);
|
1824 |
|
|
}
|
1825 |
|
|
|
1826 |
|
|
static inline void set_tsk_need_resched(struct task_struct *tsk)
|
1827 |
|
|
{
|
1828 |
|
|
set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
|
1829 |
|
|
}
|
1830 |
|
|
|
1831 |
|
|
static inline void clear_tsk_need_resched(struct task_struct *tsk)
|
1832 |
|
|
{
|
1833 |
|
|
clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
|
1834 |
|
|
}
|
1835 |
|
|
|
1836 |
|
|
static inline int signal_pending(struct task_struct *p)
|
1837 |
|
|
{
|
1838 |
|
|
return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
|
1839 |
|
|
}
|
1840 |
|
|
|
1841 |
|
|
static inline int need_resched(void)
|
1842 |
|
|
{
|
1843 |
|
|
return unlikely(test_thread_flag(TIF_NEED_RESCHED));
|
1844 |
|
|
}
|
1845 |
|
|
|
1846 |
|
|
/*
|
1847 |
|
|
* cond_resched() and cond_resched_lock(): latency reduction via
|
1848 |
|
|
* explicit rescheduling in places that are safe. The return
|
1849 |
|
|
* value indicates whether a reschedule was done in fact.
|
1850 |
|
|
* cond_resched_lock() will drop the spinlock before scheduling,
|
1851 |
|
|
* cond_resched_softirq() will enable bhs before scheduling.
|
1852 |
|
|
*/
|
1853 |
|
|
extern int cond_resched(void);
|
1854 |
|
|
extern int cond_resched_lock(spinlock_t * lock);
|
1855 |
|
|
extern int cond_resched_softirq(void);
|
1856 |
|
|
|
1857 |
|
|
/*
|
1858 |
|
|
* Does a critical section need to be broken due to another
|
1859 |
|
|
* task waiting?:
|
1860 |
|
|
*/
|
1861 |
|
|
#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
|
1862 |
|
|
# define need_lockbreak(lock) ((lock)->break_lock)
|
1863 |
|
|
#else
|
1864 |
|
|
# define need_lockbreak(lock) 0
|
1865 |
|
|
#endif
|
1866 |
|
|
|
1867 |
|
|
/*
|
1868 |
|
|
* Does a critical section need to be broken due to another
|
1869 |
|
|
* task waiting or preemption being signalled:
|
1870 |
|
|
*/
|
1871 |
|
|
static inline int lock_need_resched(spinlock_t *lock)
|
1872 |
|
|
{
|
1873 |
|
|
if (need_lockbreak(lock) || need_resched())
|
1874 |
|
|
return 1;
|
1875 |
|
|
return 0;
|
1876 |
|
|
}
|
1877 |
|
|
|
1878 |
|
|
/*
|
1879 |
|
|
* Reevaluate whether the task has signals pending delivery.
|
1880 |
|
|
* Wake the task if so.
|
1881 |
|
|
* This is required every time the blocked sigset_t changes.
|
1882 |
|
|
* callers must hold sighand->siglock.
|
1883 |
|
|
*/
|
1884 |
|
|
extern void recalc_sigpending_and_wake(struct task_struct *t);
|
1885 |
|
|
extern void recalc_sigpending(void);
|
1886 |
|
|
|
1887 |
|
|
extern void signal_wake_up(struct task_struct *t, int resume_stopped);
|
1888 |
|
|
|
1889 |
|
|
/*
|
1890 |
|
|
* Wrappers for p->thread_info->cpu access. No-op on UP.
|
1891 |
|
|
*/
|
1892 |
|
|
#ifdef CONFIG_SMP
|
1893 |
|
|
|
1894 |
|
|
static inline unsigned int task_cpu(const struct task_struct *p)
|
1895 |
|
|
{
|
1896 |
|
|
return task_thread_info(p)->cpu;
|
1897 |
|
|
}
|
1898 |
|
|
|
1899 |
|
|
extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
|
1900 |
|
|
|
1901 |
|
|
#else
|
1902 |
|
|
|
1903 |
|
|
static inline unsigned int task_cpu(const struct task_struct *p)
|
1904 |
|
|
{
|
1905 |
|
|
return 0;
|
1906 |
|
|
}
|
1907 |
|
|
|
1908 |
|
|
static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
|
1909 |
|
|
{
|
1910 |
|
|
}
|
1911 |
|
|
|
1912 |
|
|
#endif /* CONFIG_SMP */
|
1913 |
|
|
|
1914 |
|
|
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
|
1915 |
|
|
extern void arch_pick_mmap_layout(struct mm_struct *mm);
|
1916 |
|
|
#else
|
1917 |
|
|
static inline void arch_pick_mmap_layout(struct mm_struct *mm)
|
1918 |
|
|
{
|
1919 |
|
|
mm->mmap_base = TASK_UNMAPPED_BASE;
|
1920 |
|
|
mm->get_unmapped_area = arch_get_unmapped_area;
|
1921 |
|
|
mm->unmap_area = arch_unmap_area;
|
1922 |
|
|
}
|
1923 |
|
|
#endif
|
1924 |
|
|
|
1925 |
|
|
extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
|
1926 |
|
|
extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
|
1927 |
|
|
|
1928 |
|
|
extern int sched_mc_power_savings, sched_smt_power_savings;
|
1929 |
|
|
|
1930 |
|
|
extern void normalize_rt_tasks(void);
|
1931 |
|
|
|
1932 |
|
|
#ifdef CONFIG_FAIR_GROUP_SCHED
|
1933 |
|
|
|
1934 |
|
|
extern struct task_group init_task_group;
|
1935 |
|
|
|
1936 |
|
|
extern struct task_group *sched_create_group(void);
|
1937 |
|
|
extern void sched_destroy_group(struct task_group *tg);
|
1938 |
|
|
extern void sched_move_task(struct task_struct *tsk);
|
1939 |
|
|
extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
|
1940 |
|
|
extern unsigned long sched_group_shares(struct task_group *tg);
|
1941 |
|
|
|
1942 |
|
|
#endif
|
1943 |
|
|
|
1944 |
|
|
#ifdef CONFIG_TASK_XACCT
|
1945 |
|
|
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
|
1946 |
|
|
{
|
1947 |
|
|
tsk->rchar += amt;
|
1948 |
|
|
}
|
1949 |
|
|
|
1950 |
|
|
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
|
1951 |
|
|
{
|
1952 |
|
|
tsk->wchar += amt;
|
1953 |
|
|
}
|
1954 |
|
|
|
1955 |
|
|
static inline void inc_syscr(struct task_struct *tsk)
|
1956 |
|
|
{
|
1957 |
|
|
tsk->syscr++;
|
1958 |
|
|
}
|
1959 |
|
|
|
1960 |
|
|
static inline void inc_syscw(struct task_struct *tsk)
|
1961 |
|
|
{
|
1962 |
|
|
tsk->syscw++;
|
1963 |
|
|
}
|
1964 |
|
|
#else
|
1965 |
|
|
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
|
1966 |
|
|
{
|
1967 |
|
|
}
|
1968 |
|
|
|
1969 |
|
|
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
|
1970 |
|
|
{
|
1971 |
|
|
}
|
1972 |
|
|
|
1973 |
|
|
static inline void inc_syscr(struct task_struct *tsk)
|
1974 |
|
|
{
|
1975 |
|
|
}
|
1976 |
|
|
|
1977 |
|
|
static inline void inc_syscw(struct task_struct *tsk)
|
1978 |
|
|
{
|
1979 |
|
|
}
|
1980 |
|
|
#endif
|
1981 |
|
|
|
1982 |
|
|
#ifdef CONFIG_SMP
|
1983 |
|
|
void migration_init(void);
|
1984 |
|
|
#else
|
1985 |
|
|
static inline void migration_init(void)
|
1986 |
|
|
{
|
1987 |
|
|
}
|
1988 |
|
|
#endif
|
1989 |
|
|
|
1990 |
|
|
#endif /* __KERNEL__ */
|
1991 |
|
|
|
1992 |
|
|
#endif
|