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marcus.erl |
Kernel Parameters
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~~~~~~~~~~~~~~~~~
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The following is a consolidated list of the kernel parameters as implemented
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(mostly) by the __setup() macro and sorted into English Dictionary order
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(defined as ignoring all punctuation and sorting digits before letters in a
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case insensitive manner), and with descriptions where known.
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Module parameters for loadable modules are specified only as the
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parameter name with optional '=' and value as appropriate, such as:
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modprobe usbcore blinkenlights=1
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Module parameters for modules that are built into the kernel image
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are specified on the kernel command line with the module name plus
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'.' plus parameter name, with '=' and value if appropriate, such as:
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usbcore.blinkenlights=1
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This document may not be entirely up to date and comprehensive. The command
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"modinfo -p ${modulename}" shows a current list of all parameters of a loadable
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module. Loadable modules, after being loaded into the running kernel, also
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reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
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parameters may be changed at runtime by the command
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"echo -n ${value} > /sys/module/${modulename}/parameters/${parm}".
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The parameters listed below are only valid if certain kernel build options were
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enabled and if respective hardware is present. The text in square brackets at
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the beginning of each description states the restrictions within which a
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parameter is applicable:
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ACPI ACPI support is enabled.
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AGP AGP (Accelerated Graphics Port) is enabled.
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ALSA ALSA sound support is enabled.
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APIC APIC support is enabled.
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APM Advanced Power Management support is enabled.
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AX25 Appropriate AX.25 support is enabled.
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BLACKFIN Blackfin architecture is enabled.
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DRM Direct Rendering Management support is enabled.
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EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
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EFI EFI Partitioning (GPT) is enabled
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EIDE EIDE/ATAPI support is enabled.
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FB The frame buffer device is enabled.
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HW Appropriate hardware is enabled.
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IA-64 IA-64 architecture is enabled.
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IOSCHED More than one I/O scheduler is enabled.
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IP_PNP IP DHCP, BOOTP, or RARP is enabled.
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ISAPNP ISA PnP code is enabled.
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ISDN Appropriate ISDN support is enabled.
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JOY Appropriate joystick support is enabled.
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LIBATA Libata driver is enabled
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LP Printer support is enabled.
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LOOP Loopback device support is enabled.
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M68k M68k architecture is enabled.
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These options have more detailed description inside of
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Documentation/m68k/kernel-options.txt.
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MCA MCA bus support is enabled.
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MDA MDA console support is enabled.
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MOUSE Appropriate mouse support is enabled.
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MSI Message Signaled Interrupts (PCI).
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MTD MTD (Memory Technology Device) support is enabled.
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NET Appropriate network support is enabled.
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NUMA NUMA support is enabled.
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GENERIC_TIME The generic timeofday code is enabled.
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NFS Appropriate NFS support is enabled.
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OSS OSS sound support is enabled.
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PV_OPS A paravirtualized kernel is enabled.
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PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
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PARISC The PA-RISC architecture is enabled.
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PCI PCI bus support is enabled.
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PCIE PCI Express support is enabled.
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PCMCIA The PCMCIA subsystem is enabled.
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PNP Plug & Play support is enabled.
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PPC PowerPC architecture is enabled.
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PPT Parallel port support is enabled.
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PS2 Appropriate PS/2 support is enabled.
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RAM RAM disk support is enabled.
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ROOTPLUG The example Root Plug LSM is enabled.
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S390 S390 architecture is enabled.
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SCSI Appropriate SCSI support is enabled.
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A lot of drivers has their options described inside of
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Documentation/scsi/.
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SECURITY Different security models are enabled.
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SELINUX SELinux support is enabled.
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SERIAL Serial support is enabled.
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SH SuperH architecture is enabled.
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SMP The kernel is an SMP kernel.
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SPARC Sparc architecture is enabled.
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SWSUSP Software suspend is enabled.
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TS Appropriate touchscreen support is enabled.
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USB USB support is enabled.
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USBHID USB Human Interface Device support is enabled.
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V4L Video For Linux support is enabled.
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VGA The VGA console has been enabled.
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VT Virtual terminal support is enabled.
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WDT Watchdog support is enabled.
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XT IBM PC/XT MFM hard disk support is enabled.
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X86-32 X86-32, aka i386 architecture is enabled.
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X86-64 X86-64 architecture is enabled.
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More X86-64 boot options can be found in
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Documentation/x86_64/boot-options.txt .
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In addition, the following text indicates that the option:
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BUGS= Relates to possible processor bugs on the said processor.
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KNL Is a kernel start-up parameter.
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BOOT Is a boot loader parameter.
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Parameters denoted with BOOT are actually interpreted by the boot
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loader, and have no meaning to the kernel directly.
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Do not modify the syntax of boot loader parameters without extreme
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need or coordination with .
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There are also arch-specific kernel-parameters not documented here.
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See for example .
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Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
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a trailing = on the name of any parameter states that that parameter will
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be entered as an environment variable, whereas its absence indicates that
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it will appear as a kernel argument readable via /proc/cmdline by programs
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running once the system is up.
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The number of kernel parameters is not limited, but the length of the
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complete command line (parameters including spaces etc.) is limited to
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a fixed number of characters. This limit depends on the architecture
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and is between 256 and 4096 characters. It is defined in the file
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./include/asm/setup.h as COMMAND_LINE_SIZE.
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acpi= [HW,ACPI,X86-64,i386]
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Advanced Configuration and Power Interface
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Format: { force | off | ht | strict | noirq }
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force -- enable ACPI if default was off
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off -- disable ACPI if default was on
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noirq -- do not use ACPI for IRQ routing
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ht -- run only enough ACPI to enable Hyper Threading
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strict -- Be less tolerant of platforms that are not
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strictly ACPI specification compliant.
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See also Documentation/pm.txt, pci=noacpi
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acpi_apic_instance= [ACPI, IOAPIC]
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Format:
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2: use 2nd APIC table, if available
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1,0: use 1st APIC table
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default: 0
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acpi_sleep= [HW,ACPI] Sleep options
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Format: { s3_bios, s3_mode }
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See Documentation/power/video.txt
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acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode
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Format: { level | edge | high | low }
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acpi_irq_balance [HW,ACPI]
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ACPI will balance active IRQs
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default in APIC mode
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acpi_irq_nobalance [HW,ACPI]
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ACPI will not move active IRQs (default)
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default in PIC mode
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acpi_irq_pci= [HW,ACPI] If irq_balance, clear listed IRQs for
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use by PCI
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Format: ,...
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acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
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Format: ,...
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acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
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acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
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Format: To spoof as Windows 98: ="Microsoft Windows"
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acpi_osi= [HW,ACPI] Modify list of supported OS interface strings
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acpi_osi="string1" # add string1 -- only one string
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acpi_osi="!string2" # remove built-in string2
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acpi_osi= # disable all strings
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acpi_serialize [HW,ACPI] force serialization of AML methods
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acpi_skip_timer_override [HW,ACPI]
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Recognize and ignore IRQ0/pin2 Interrupt Override.
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For broken nForce2 BIOS resulting in XT-PIC timer.
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acpi_use_timer_override [HW,ACPI}
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Use timer override. For some broken Nvidia NF5 boards
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that require a timer override, but don't have
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HPET
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acpi.debug_layer= [HW,ACPI]
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Format:
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Each bit of the indicates an ACPI debug layer,
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1: enable, 0: disable. It is useful for boot time
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debugging. After system has booted up, it can be set
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via /sys/module/acpi/parameters/debug_layer.
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CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
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Available bits (add the numbers together) to enable debug output
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for specific parts of the ACPI subsystem:
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0x01 utilities 0x02 hardware 0x04 events 0x08 tables
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0x10 namespace 0x20 parser 0x40 dispatcher
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0x80 executer 0x100 resources 0x200 acpica debugger
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0x400 os services 0x800 acpica disassembler.
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The number can be in decimal or prefixed with 0x in hex.
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Warning: Many of these options can produce a lot of
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output and make your system unusable. Be very careful.
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acpi.debug_level= [HW,ACPI]
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Format:
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Each bit of the indicates an ACPI debug level,
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1: enable, 0: disable. It is useful for boot time
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debugging. After system has booted up, it can be set
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via /sys/module/acpi/parameters/debug_level.
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CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
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Available bits (add the numbers together) to enable different
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debug output levels of the ACPI subsystem:
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0x01 error 0x02 warn 0x04 init 0x08 debug object
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0x10 info 0x20 init names 0x40 parse 0x80 load
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0x100 dispatch 0x200 execute 0x400 names 0x800 operation region
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0x1000 bfield 0x2000 tables 0x4000 values 0x8000 objects
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0x10000 resources 0x20000 user requests 0x40000 package.
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The number can be in decimal or prefixed with 0x in hex.
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Warning: Many of these options can produce a lot of
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output and make your system unusable. Be very careful.
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acpi_pm_good [X86-32,X86-64]
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Override the pmtimer bug detection: force the kernel
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to assume that this machine's pmtimer latches its value
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and always returns good values.
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agp= [AGP]
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{ off | try_unsupported }
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off: disable AGP support
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try_unsupported: try to drive unsupported chipsets
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(may crash computer or cause data corruption)
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enable_timer_pin_1 [i386,x86-64]
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Enable PIN 1 of APIC timer
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Can be useful to work around chipset bugs
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(in particular on some ATI chipsets).
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The kernel tries to set a reasonable default.
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disable_timer_pin_1 [i386,x86-64]
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Disable PIN 1 of APIC timer
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Can be useful to work around chipset bugs.
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ad1848= [HW,OSS]
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Format: ,,,,
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advansys= [HW,SCSI]
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See header of drivers/scsi/advansys.c.
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advwdt= [HW,WDT] Advantech WDT
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Format: ,
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aedsp16= [HW,OSS] Audio Excel DSP 16
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Format: ,,,,,
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See also header of sound/oss/aedsp16.c.
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aha152x= [HW,SCSI]
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See Documentation/scsi/aha152x.txt.
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aha1542= [HW,SCSI]
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Format: [,,[,]]
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aic7xxx= [HW,SCSI]
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See Documentation/scsi/aic7xxx.txt.
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aic79xx= [HW,SCSI]
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See Documentation/scsi/aic79xx.txt.
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amijoy.map= [HW,JOY] Amiga joystick support
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Map of devices attached to JOY0DAT and JOY1DAT
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Format: ,
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See also Documentation/kernel/input/joystick.txt
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analog.map= [HW,JOY] Analog joystick and gamepad support
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Specifies type or capabilities of an analog joystick
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connected to one of 16 gameports
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Format: ,,..
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apc= [HW,SPARC]
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Power management functions (SPARCstation-4/5 + deriv.)
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Format: noidle
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Disable APC CPU standby support. SPARCstation-Fox does
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not play well with APC CPU idle - disable it if you have
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APC and your system crashes randomly.
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apic= [APIC,i386] Advanced Programmable Interrupt Controller
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Change the output verbosity whilst booting
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Format: { quiet (default) | verbose | debug }
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Change the amount of debugging information output
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when initialising the APIC and IO-APIC components.
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apm= [APM] Advanced Power Management
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See header of arch/i386/kernel/apm.c.
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arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
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Format: ,,
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ataflop= [HW,M68k]
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atarimouse= [HW,MOUSE] Atari Mouse
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atascsi= [HW,SCSI] Atari SCSI
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atkbd.extra= [HW] Enable extra LEDs and keys on IBM RapidAccess,
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EzKey and similar keyboards
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atkbd.reset= [HW] Reset keyboard during initialization
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atkbd.set= [HW] Select keyboard code set
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Format: (2 = AT (default), 3 = PS/2)
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atkbd.scroll= [HW] Enable scroll wheel on MS Office and similar
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keyboards
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atkbd.softraw= [HW] Choose between synthetic and real raw mode
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Format: (0 = real, 1 = synthetic (default))
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atkbd.softrepeat= [HW]
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Use software keyboard repeat
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autotest [IA64]
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baycom_epp= [HW,AX25]
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Format: ,
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baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
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Format: ,
|
| 330 |
|
|
See header of drivers/net/hamradio/baycom_par.c.
|
| 331 |
|
|
|
| 332 |
|
|
baycom_ser_fdx= [HW,AX25]
|
| 333 |
|
|
BayCom Serial Port AX.25 Modem (Full Duplex Mode)
|
| 334 |
|
|
Format: ,,[,]
|
| 335 |
|
|
See header of drivers/net/hamradio/baycom_ser_fdx.c.
|
| 336 |
|
|
|
| 337 |
|
|
baycom_ser_hdx= [HW,AX25]
|
| 338 |
|
|
BayCom Serial Port AX.25 Modem (Half Duplex Mode)
|
| 339 |
|
|
Format: ,,
|
| 340 |
|
|
See header of drivers/net/hamradio/baycom_ser_hdx.c.
|
| 341 |
|
|
|
| 342 |
|
|
boot_delay= Milliseconds to delay each printk during boot.
|
| 343 |
|
|
Values larger than 10 seconds (10000) are changed to
|
| 344 |
|
|
no delay (0).
|
| 345 |
|
|
Format: integer
|
| 346 |
|
|
|
| 347 |
|
|
bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
|
| 348 |
|
|
bttv.radio= Most important insmod options are available as
|
| 349 |
|
|
kernel args too.
|
| 350 |
|
|
bttv.pll= See Documentation/video4linux/bttv/Insmod-options
|
| 351 |
|
|
bttv.tuner= and Documentation/video4linux/bttv/CARDLIST
|
| 352 |
|
|
|
| 353 |
|
|
BusLogic= [HW,SCSI]
|
| 354 |
|
|
See drivers/scsi/BusLogic.c, comment before function
|
| 355 |
|
|
BusLogic_ParseDriverOptions().
|
| 356 |
|
|
|
| 357 |
|
|
c101= [NET] Moxa C101 synchronous serial card
|
| 358 |
|
|
|
| 359 |
|
|
cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
|
| 360 |
|
|
Sometimes CPU hardware bugs make them report the cache
|
| 361 |
|
|
size incorrectly. The kernel will attempt work arounds
|
| 362 |
|
|
to fix known problems, but for some CPUs it is not
|
| 363 |
|
|
possible to determine what the correct size should be.
|
| 364 |
|
|
This option provides an override for these situations.
|
| 365 |
|
|
|
| 366 |
|
|
capability.disable=
|
| 367 |
|
|
[SECURITY] Disable capabilities. This would normally
|
| 368 |
|
|
be used only if an alternative security model is to be
|
| 369 |
|
|
configured. Potentially dangerous and should only be
|
| 370 |
|
|
used if you are entirely sure of the consequences.
|
| 371 |
|
|
|
| 372 |
|
|
chandev= [HW,NET] Generic channel device initialisation
|
| 373 |
|
|
|
| 374 |
|
|
checkreqprot [SELINUX] Set initial checkreqprot flag value.
|
| 375 |
|
|
Format: { "0" | "1" }
|
| 376 |
|
|
See security/selinux/Kconfig help text.
|
| 377 |
|
|
|
| 378 |
|
|
any implied execute protection).
|
| 379 |
|
|
1 -- check protection requested by application.
|
| 380 |
|
|
Default value is set via a kernel config option.
|
| 381 |
|
|
Value can be changed at runtime via
|
| 382 |
|
|
/selinux/checkreqprot.
|
| 383 |
|
|
|
| 384 |
|
|
clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
|
| 385 |
|
|
[Deprecated]
|
| 386 |
|
|
Forces specified clocksource (if available) to be used
|
| 387 |
|
|
when calculating gettimeofday(). If specified
|
| 388 |
|
|
clocksource is not available, it defaults to PIT.
|
| 389 |
|
|
Format: { pit | tsc | cyclone | pmtmr }
|
| 390 |
|
|
|
| 391 |
|
|
clocksource= [GENERIC_TIME] Override the default clocksource
|
| 392 |
|
|
Format:
|
| 393 |
|
|
Override the default clocksource and use the clocksource
|
| 394 |
|
|
with the name specified.
|
| 395 |
|
|
Some clocksource names to choose from, depending on
|
| 396 |
|
|
the platform:
|
| 397 |
|
|
[all] jiffies (this is the base, fallback clocksource)
|
| 398 |
|
|
[ACPI] acpi_pm
|
| 399 |
|
|
[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
|
| 400 |
|
|
pxa_timer,timer3,32k_counter,timer0_1
|
| 401 |
|
|
[AVR32] avr32
|
| 402 |
|
|
[X86-32] pit,hpet,tsc,vmi-timer;
|
| 403 |
|
|
scx200_hrt on Geode; cyclone on IBM x440
|
| 404 |
|
|
[MIPS] MIPS
|
| 405 |
|
|
[PARISC] cr16
|
| 406 |
|
|
[S390] tod
|
| 407 |
|
|
[SH] SuperH
|
| 408 |
|
|
[SPARC64] tick
|
| 409 |
|
|
[X86-64] hpet,tsc
|
| 410 |
|
|
|
| 411 |
|
|
code_bytes [IA32] How many bytes of object code to print in an
|
| 412 |
|
|
oops report.
|
| 413 |
|
|
Range: 0 - 8192
|
| 414 |
|
|
Default: 64
|
| 415 |
|
|
|
| 416 |
|
|
disable_8254_timer
|
| 417 |
|
|
enable_8254_timer
|
| 418 |
|
|
[IA32/X86_64] Disable/Enable interrupt 0 timer routing
|
| 419 |
|
|
over the 8254 in addition to over the IO-APIC. The
|
| 420 |
|
|
kernel tries to set a sensible default.
|
| 421 |
|
|
|
| 422 |
|
|
hpet= [X86-32,HPET] option to control HPET usage
|
| 423 |
|
|
Format: { enable (default) | disable | force }
|
| 424 |
|
|
disable: disable HPET and use PIT instead
|
| 425 |
|
|
force: allow force enabled of undocumented chips (ICH4,
|
| 426 |
|
|
VIA, nVidia)
|
| 427 |
|
|
|
| 428 |
|
|
com20020= [HW,NET] ARCnet - COM20020 chipset
|
| 429 |
|
|
Format:
|
| 430 |
|
|
[,[,[,[,[,]]]]]
|
| 431 |
|
|
|
| 432 |
|
|
com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
|
| 433 |
|
|
Format: [,]
|
| 434 |
|
|
|
| 435 |
|
|
com90xx= [HW,NET]
|
| 436 |
|
|
ARCnet - COM90xx chipset (memory-mapped buffers)
|
| 437 |
|
|
Format: [,[,]]
|
| 438 |
|
|
|
| 439 |
|
|
condev= [HW,S390] console device
|
| 440 |
|
|
conmode=
|
| 441 |
|
|
|
| 442 |
|
|
console= [KNL] Output console device and options.
|
| 443 |
|
|
|
| 444 |
|
|
tty Use the virtual console device .
|
| 445 |
|
|
|
| 446 |
|
|
ttyS[,options]
|
| 447 |
|
|
ttyUSB0[,options]
|
| 448 |
|
|
Use the specified serial port. The options are of
|
| 449 |
|
|
the form "bbbbpnf", where "bbbb" is the baud rate,
|
| 450 |
|
|
"p" is parity ("n", "o", or "e"), "n" is number of
|
| 451 |
|
|
bits, and "f" is flow control ("r" for RTS or
|
| 452 |
|
|
omit it). Default is "9600n8".
|
| 453 |
|
|
|
| 454 |
|
|
See Documentation/serial-console.txt for more
|
| 455 |
|
|
information. See
|
| 456 |
|
|
Documentation/networking/netconsole.txt for an
|
| 457 |
|
|
alternative.
|
| 458 |
|
|
|
| 459 |
|
|
uart[8250],io,[,options]
|
| 460 |
|
|
uart[8250],mmio,[,options]
|
| 461 |
|
|
Start an early, polled-mode console on the 8250/16550
|
| 462 |
|
|
UART at the specified I/O port or MMIO address,
|
| 463 |
|
|
switching to the matching ttyS device later. The
|
| 464 |
|
|
options are the same as for ttyS, above.
|
| 465 |
|
|
|
| 466 |
|
|
earlycon= [KNL] Output early console device and options.
|
| 467 |
|
|
uart[8250],io,[,options]
|
| 468 |
|
|
uart[8250],mmio,[,options]
|
| 469 |
|
|
Start an early, polled-mode console on the 8250/16550
|
| 470 |
|
|
UART at the specified I/O port or MMIO address.
|
| 471 |
|
|
The options are the same as for ttyS, above.
|
| 472 |
|
|
|
| 473 |
|
|
no_console_suspend
|
| 474 |
|
|
[HW] Never suspend the console
|
| 475 |
|
|
Disable suspending of consoles during suspend and
|
| 476 |
|
|
hibernate operations. Once disabled, debugging
|
| 477 |
|
|
messages can reach various consoles while the rest
|
| 478 |
|
|
of the system is being put to sleep (ie, while
|
| 479 |
|
|
debugging driver suspend/resume hooks). This may
|
| 480 |
|
|
not work reliably with all consoles, but is known
|
| 481 |
|
|
to work with serial and VGA consoles.
|
| 482 |
|
|
|
| 483 |
|
|
cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver
|
| 484 |
|
|
Format:
|
| 485 |
|
|
,,,[,]
|
| 486 |
|
|
|
| 487 |
|
|
crashkernel=nn[KMG]@ss[KMG]
|
| 488 |
|
|
[KNL] Reserve a chunk of physical memory to
|
| 489 |
|
|
hold a kernel to switch to with kexec on panic.
|
| 490 |
|
|
|
| 491 |
|
|
crashkernel=range1:size1[,range2:size2,...][@offset]
|
| 492 |
|
|
[KNL] Same as above, but depends on the memory
|
| 493 |
|
|
in the running system. The syntax of range is
|
| 494 |
|
|
start-[end] where start and end are both
|
| 495 |
|
|
a memory unit (amount[KMG]). See also
|
| 496 |
|
|
Documentation/kdump/kdump.txt for a example.
|
| 497 |
|
|
|
| 498 |
|
|
cs4232= [HW,OSS]
|
| 499 |
|
|
Format: ,,,,,
|
| 500 |
|
|
|
| 501 |
|
|
cs89x0_dma= [HW,NET]
|
| 502 |
|
|
Format:
|
| 503 |
|
|
|
| 504 |
|
|
cs89x0_media= [HW,NET]
|
| 505 |
|
|
Format: { rj45 | aui | bnc }
|
| 506 |
|
|
|
| 507 |
|
|
dasd= [HW,NET]
|
| 508 |
|
|
See header of drivers/s390/block/dasd_devmap.c.
|
| 509 |
|
|
|
| 510 |
|
|
db9.dev[2|3]= [HW,JOY] Multisystem joystick support via parallel port
|
| 511 |
|
|
(one device per port)
|
| 512 |
|
|
Format: ,
|
| 513 |
|
|
See also Documentation/input/joystick-parport.txt
|
| 514 |
|
|
|
| 515 |
|
|
debug [KNL] Enable kernel debugging (events log level).
|
| 516 |
|
|
|
| 517 |
|
|
debug_locks_verbose=
|
| 518 |
|
|
[KNL] verbose self-tests
|
| 519 |
|
|
Format=<0|1>
|
| 520 |
|
|
Print debugging info while doing the locking API
|
| 521 |
|
|
self-tests.
|
| 522 |
|
|
We default to 0 (no extra messages), setting it to
|
| 523 |
|
|
1 will print _a lot_ more information - normally
|
| 524 |
|
|
only useful to kernel developers.
|
| 525 |
|
|
|
| 526 |
|
|
decnet= [HW,NET]
|
| 527 |
|
|
Format: [,]
|
| 528 |
|
|
See also Documentation/networking/decnet.txt.
|
| 529 |
|
|
|
| 530 |
|
|
vt.default_blu= [VT]
|
| 531 |
|
|
Format: ,,,...,
|
| 532 |
|
|
Change the default blue palette of the console.
|
| 533 |
|
|
This is a 16-member array composed of values
|
| 534 |
|
|
ranging from 0-255.
|
| 535 |
|
|
|
| 536 |
|
|
vt.default_grn= [VT]
|
| 537 |
|
|
Format: ,,,...,
|
| 538 |
|
|
Change the default green palette of the console.
|
| 539 |
|
|
This is a 16-member array composed of values
|
| 540 |
|
|
ranging from 0-255.
|
| 541 |
|
|
|
| 542 |
|
|
vt.default_red= [VT]
|
| 543 |
|
|
Format: ,,,...,
|
| 544 |
|
|
Change the default red palette of the console.
|
| 545 |
|
|
This is a 16-member array composed of values
|
| 546 |
|
|
ranging from 0-255.
|
| 547 |
|
|
|
| 548 |
|
|
vt.default_utf8=
|
| 549 |
|
|
[VT]
|
| 550 |
|
|
Format=<0|1>
|
| 551 |
|
|
Set system-wide default UTF-8 mode for all tty's.
|
| 552 |
|
|
Default is 1, i.e. UTF-8 mode is enabled for all
|
| 553 |
|
|
newly opened terminals.
|
| 554 |
|
|
|
| 555 |
|
|
dhash_entries= [KNL]
|
| 556 |
|
|
Set number of hash buckets for dentry cache.
|
| 557 |
|
|
|
| 558 |
|
|
digi= [HW,SERIAL]
|
| 559 |
|
|
IO parameters + enable/disable command.
|
| 560 |
|
|
|
| 561 |
|
|
digiepca= [HW,SERIAL]
|
| 562 |
|
|
See drivers/char/README.epca and
|
| 563 |
|
|
Documentation/digiepca.txt.
|
| 564 |
|
|
|
| 565 |
|
|
dmasound= [HW,OSS] Sound subsystem buffers
|
| 566 |
|
|
|
| 567 |
|
|
dscc4.setup= [NET]
|
| 568 |
|
|
|
| 569 |
|
|
dtc3181e= [HW,SCSI]
|
| 570 |
|
|
|
| 571 |
|
|
earlyprintk= [X86-32,X86-64,SH,BLACKFIN]
|
| 572 |
|
|
earlyprintk=vga
|
| 573 |
|
|
earlyprintk=serial[,ttySn[,baudrate]]
|
| 574 |
|
|
|
| 575 |
|
|
Append ",keep" to not disable it when the real console
|
| 576 |
|
|
takes over.
|
| 577 |
|
|
|
| 578 |
|
|
Only vga or serial at a time, not both.
|
| 579 |
|
|
|
| 580 |
|
|
Currently only ttyS0 and ttyS1 are supported.
|
| 581 |
|
|
|
| 582 |
|
|
Interaction with the standard serial driver is not
|
| 583 |
|
|
very good.
|
| 584 |
|
|
|
| 585 |
|
|
The VGA output is eventually overwritten by the real
|
| 586 |
|
|
console.
|
| 587 |
|
|
|
| 588 |
|
|
eata= [HW,SCSI]
|
| 589 |
|
|
|
| 590 |
|
|
edd= [EDD]
|
| 591 |
|
|
Format: {"of[f]" | "sk[ipmbr]"}
|
| 592 |
|
|
See comment in arch/i386/boot/edd.S
|
| 593 |
|
|
|
| 594 |
|
|
eisa_irq_edge= [PARISC,HW]
|
| 595 |
|
|
See header of drivers/parisc/eisa.c.
|
| 596 |
|
|
|
| 597 |
|
|
elanfreq= [X86-32]
|
| 598 |
|
|
See comment before function elanfreq_setup() in
|
| 599 |
|
|
arch/i386/kernel/cpu/cpufreq/elanfreq.c.
|
| 600 |
|
|
|
| 601 |
|
|
elevator= [IOSCHED]
|
| 602 |
|
|
Format: {"anticipatory" | "cfq" | "deadline" | "noop"}
|
| 603 |
|
|
See Documentation/block/as-iosched.txt and
|
| 604 |
|
|
Documentation/block/deadline-iosched.txt for details.
|
| 605 |
|
|
|
| 606 |
|
|
elfcorehdr= [X86-32, X86_64]
|
| 607 |
|
|
Specifies physical address of start of kernel core
|
| 608 |
|
|
image elf header. Generally kexec loader will
|
| 609 |
|
|
pass this option to capture kernel.
|
| 610 |
|
|
See Documentation/kdump/kdump.txt for details.
|
| 611 |
|
|
|
| 612 |
|
|
enforcing [SELINUX] Set initial enforcing status.
|
| 613 |
|
|
Format: {"0" | "1"}
|
| 614 |
|
|
See security/selinux/Kconfig help text.
|
| 615 |
|
|
|
| 616 |
|
|
1 -- enforcing (deny and log).
|
| 617 |
|
|
Default value is 0.
|
| 618 |
|
|
Value can be changed at runtime via /selinux/enforce.
|
| 619 |
|
|
|
| 620 |
|
|
es1371= [HW,OSS]
|
| 621 |
|
|
Format: ,[,[]]
|
| 622 |
|
|
See also header of sound/oss/es1371.c.
|
| 623 |
|
|
|
| 624 |
|
|
ether= [HW,NET] Ethernet cards parameters
|
| 625 |
|
|
This option is obsoleted by the "netdev=" option, which
|
| 626 |
|
|
has equivalent usage. See its documentation for details.
|
| 627 |
|
|
|
| 628 |
|
|
eurwdt= [HW,WDT] Eurotech CPU-1220/1410 onboard watchdog.
|
| 629 |
|
|
Format: [,]
|
| 630 |
|
|
|
| 631 |
|
|
failslab=
|
| 632 |
|
|
fail_page_alloc=
|
| 633 |
|
|
fail_make_request=[KNL]
|
| 634 |
|
|
General fault injection mechanism.
|
| 635 |
|
|
Format: ,,,
|
| 636 |
|
|
See also /Documentation/fault-injection/.
|
| 637 |
|
|
|
| 638 |
|
|
fd_mcs= [HW,SCSI]
|
| 639 |
|
|
See header of drivers/scsi/fd_mcs.c.
|
| 640 |
|
|
|
| 641 |
|
|
fdomain= [HW,SCSI]
|
| 642 |
|
|
See header of drivers/scsi/fdomain.c.
|
| 643 |
|
|
|
| 644 |
|
|
floppy= [HW]
|
| 645 |
|
|
See Documentation/floppy.txt.
|
| 646 |
|
|
|
| 647 |
|
|
gamecon.map[2|3]=
|
| 648 |
|
|
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
|
| 649 |
|
|
support via parallel port (up to 5 devices per port)
|
| 650 |
|
|
Format: ,,,,,
|
| 651 |
|
|
See also Documentation/input/joystick-parport.txt
|
| 652 |
|
|
|
| 653 |
|
|
gamma= [HW,DRM]
|
| 654 |
|
|
|
| 655 |
|
|
gdth= [HW,SCSI]
|
| 656 |
|
|
See header of drivers/scsi/gdth.c.
|
| 657 |
|
|
|
| 658 |
|
|
gpt [EFI] Forces disk with valid GPT signature but
|
| 659 |
|
|
invalid Protective MBR to be treated as GPT.
|
| 660 |
|
|
|
| 661 |
|
|
gvp11= [HW,SCSI]
|
| 662 |
|
|
|
| 663 |
|
|
hashdist= [KNL,NUMA] Large hashes allocated during boot
|
| 664 |
|
|
are distributed across NUMA nodes. Defaults on
|
| 665 |
|
|
for IA-64, off otherwise.
|
| 666 |
|
|
Format: 0 | 1 (for off | on)
|
| 667 |
|
|
|
| 668 |
|
|
hcl= [IA-64] SGI's Hardware Graph compatibility layer
|
| 669 |
|
|
|
| 670 |
|
|
hd= [EIDE] (E)IDE hard drive subsystem geometry
|
| 671 |
|
|
Format: ,,
|
| 672 |
|
|
|
| 673 |
|
|
hd?= [HW] (E)IDE subsystem
|
| 674 |
|
|
hd?lun= See Documentation/ide.txt.
|
| 675 |
|
|
|
| 676 |
|
|
highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
|
| 677 |
|
|
size of . This works even on boxes that have no
|
| 678 |
|
|
highmem otherwise. This also works to reduce highmem
|
| 679 |
|
|
size on bigger boxes.
|
| 680 |
|
|
|
| 681 |
|
|
highres= [KNL] Enable/disable high resolution timer mode.
|
| 682 |
|
|
Valid parameters: "on", "off"
|
| 683 |
|
|
Default: "on"
|
| 684 |
|
|
|
| 685 |
|
|
hisax= [HW,ISDN]
|
| 686 |
|
|
See Documentation/isdn/README.HiSax.
|
| 687 |
|
|
|
| 688 |
|
|
hugepages= [HW,X86-32,IA-64] Maximal number of HugeTLB pages.
|
| 689 |
|
|
|
| 690 |
|
|
i8042.direct [HW] Put keyboard port into non-translated mode
|
| 691 |
|
|
i8042.dumbkbd [HW] Pretend that controller can only read data from
|
| 692 |
|
|
keyboard and cannot control its state
|
| 693 |
|
|
(Don't attempt to blink the leds)
|
| 694 |
|
|
i8042.noaux [HW] Don't check for auxiliary (== mouse) port
|
| 695 |
|
|
i8042.nokbd [HW] Don't check/create keyboard port
|
| 696 |
|
|
i8042.nomux [HW] Don't check presence of an active multiplexing
|
| 697 |
|
|
controller
|
| 698 |
|
|
i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
|
| 699 |
|
|
controllers
|
| 700 |
|
|
i8042.panicblink=
|
| 701 |
|
|
[HW] Frequency with which keyboard LEDs should blink
|
| 702 |
|
|
when kernel panics (default is 0.5 sec)
|
| 703 |
|
|
i8042.reset [HW] Reset the controller during init and cleanup
|
| 704 |
|
|
i8042.unlock [HW] Unlock (ignore) the keylock
|
| 705 |
|
|
|
| 706 |
|
|
i810= [HW,DRM]
|
| 707 |
|
|
|
| 708 |
|
|
i8k.ignore_dmi [HW] Continue probing hardware even if DMI data
|
| 709 |
|
|
indicates that the driver is running on unsupported
|
| 710 |
|
|
hardware.
|
| 711 |
|
|
i8k.force [HW] Activate i8k driver even if SMM BIOS signature
|
| 712 |
|
|
does not match list of supported models.
|
| 713 |
|
|
i8k.power_status
|
| 714 |
|
|
[HW] Report power status in /proc/i8k
|
| 715 |
|
|
(disabled by default)
|
| 716 |
|
|
i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN
|
| 717 |
|
|
capability is set.
|
| 718 |
|
|
|
| 719 |
|
|
ibmmcascsi= [HW,MCA,SCSI] IBM MicroChannel SCSI adapter
|
| 720 |
|
|
See Documentation/mca.txt.
|
| 721 |
|
|
|
| 722 |
|
|
icn= [HW,ISDN]
|
| 723 |
|
|
Format: [,[,[,]]]
|
| 724 |
|
|
|
| 725 |
|
|
ide= [HW] (E)IDE subsystem
|
| 726 |
|
|
Format: ide=nodma or ide=doubler or ide=reverse
|
| 727 |
|
|
See Documentation/ide.txt.
|
| 728 |
|
|
|
| 729 |
|
|
ide?= [HW] (E)IDE subsystem
|
| 730 |
|
|
Format: ide?=noprobe or chipset specific parameters.
|
| 731 |
|
|
See Documentation/ide.txt.
|
| 732 |
|
|
|
| 733 |
|
|
idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
|
| 734 |
|
|
See Documentation/ide.txt.
|
| 735 |
|
|
|
| 736 |
|
|
idle= [X86]
|
| 737 |
|
|
Format: idle=poll or idle=mwait
|
| 738 |
|
|
Poll forces a polling idle loop that can slightly improves the performance
|
| 739 |
|
|
of waking up a idle CPU, but will use a lot of power and make the system
|
| 740 |
|
|
run hot. Not recommended.
|
| 741 |
|
|
idle=mwait. On systems which support MONITOR/MWAIT but the kernel chose
|
| 742 |
|
|
to not use it because it doesn't save as much power as a normal idle
|
| 743 |
|
|
loop use the MONITOR/MWAIT idle loop anyways. Performance should be the same
|
| 744 |
|
|
as idle=poll.
|
| 745 |
|
|
|
| 746 |
|
|
ignore_loglevel [KNL]
|
| 747 |
|
|
Ignore loglevel setting - this will print /all/
|
| 748 |
|
|
kernel messages to the console. Useful for debugging.
|
| 749 |
|
|
|
| 750 |
|
|
ihash_entries= [KNL]
|
| 751 |
|
|
Set number of hash buckets for inode cache.
|
| 752 |
|
|
|
| 753 |
|
|
in2000= [HW,SCSI]
|
| 754 |
|
|
See header of drivers/scsi/in2000.c.
|
| 755 |
|
|
|
| 756 |
|
|
init= [KNL]
|
| 757 |
|
|
Format:
|
| 758 |
|
|
Run specified binary instead of /sbin/init as init
|
| 759 |
|
|
process.
|
| 760 |
|
|
|
| 761 |
|
|
initcall_debug [KNL] Trace initcalls as they are executed. Useful
|
| 762 |
|
|
for working out where the kernel is dying during
|
| 763 |
|
|
startup.
|
| 764 |
|
|
|
| 765 |
|
|
initrd= [BOOT] Specify the location of the initial ramdisk
|
| 766 |
|
|
|
| 767 |
|
|
inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver
|
| 768 |
|
|
Format:
|
| 769 |
|
|
|
| 770 |
|
|
inttest= [IA64]
|
| 771 |
|
|
|
| 772 |
|
|
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
|
| 773 |
|
|
off
|
| 774 |
|
|
Disable intel iommu driver.
|
| 775 |
|
|
igfx_off [Default Off]
|
| 776 |
|
|
By default, gfx is mapped as normal device. If a gfx
|
| 777 |
|
|
device has a dedicated DMAR unit, the DMAR unit is
|
| 778 |
|
|
bypassed by not enabling DMAR with this option. In
|
| 779 |
|
|
this case, gfx device will use physical address for
|
| 780 |
|
|
DMA.
|
| 781 |
|
|
forcedac [x86_64]
|
| 782 |
|
|
With this option iommu will not optimize to look
|
| 783 |
|
|
for io virtual address below 32 bit forcing dual
|
| 784 |
|
|
address cycle on pci bus for cards supporting greater
|
| 785 |
|
|
than 32 bit addressing. The default is to look
|
| 786 |
|
|
for translation below 32 bit and if not available
|
| 787 |
|
|
then look in the higher range.
|
| 788 |
|
|
|
| 789 |
|
|
io7= [HW] IO7 for Marvel based alpha systems
|
| 790 |
|
|
See comment before marvel_specify_io7 in
|
| 791 |
|
|
arch/alpha/kernel/core_marvel.c.
|
| 792 |
|
|
|
| 793 |
|
|
ip= [IP_PNP]
|
| 794 |
|
|
See Documentation/nfsroot.txt.
|
| 795 |
|
|
|
| 796 |
|
|
ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
|
| 797 |
|
|
See comment before ip2_setup() in
|
| 798 |
|
|
drivers/char/ip2/ip2base.c.
|
| 799 |
|
|
|
| 800 |
|
|
ips= [HW,SCSI] Adaptec / IBM ServeRAID controller
|
| 801 |
|
|
See header of drivers/scsi/ips.c.
|
| 802 |
|
|
|
| 803 |
|
|
ports= [IP_VS_FTP] IPVS ftp helper module
|
| 804 |
|
|
Default is 21.
|
| 805 |
|
|
Up to 8 (IP_VS_APP_MAX_PORTS) ports
|
| 806 |
|
|
may be specified.
|
| 807 |
|
|
Format: ,....
|
| 808 |
|
|
|
| 809 |
|
|
irqfixup [HW]
|
| 810 |
|
|
When an interrupt is not handled search all handlers
|
| 811 |
|
|
for it. Intended to get systems with badly broken
|
| 812 |
|
|
firmware running.
|
| 813 |
|
|
|
| 814 |
|
|
irqpoll [HW]
|
| 815 |
|
|
When an interrupt is not handled search all handlers
|
| 816 |
|
|
for it. Also check all handlers each timer
|
| 817 |
|
|
interrupt. Intended to get systems with badly broken
|
| 818 |
|
|
firmware running.
|
| 819 |
|
|
|
| 820 |
|
|
isapnp= [ISAPNP]
|
| 821 |
|
|
Format: ,,,
|
| 822 |
|
|
|
| 823 |
|
|
isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
|
| 824 |
|
|
Format:
|
| 825 |
|
|
,...,
|
| 826 |
|
|
or
|
| 827 |
|
|
- (must be a positive range in ascending order)
|
| 828 |
|
|
or a mixture
|
| 829 |
|
|
,...,-
|
| 830 |
|
|
This option can be used to specify one or more CPUs
|
| 831 |
|
|
to isolate from the general SMP balancing and scheduling
|
| 832 |
|
|
algorithms. The only way to move a process onto or off
|
| 833 |
|
|
an "isolated" CPU is via the CPU affinity syscalls.
|
| 834 |
|
|
begins at 0 and the maximum value is
|
| 835 |
|
|
"number of CPUs in system - 1".
|
| 836 |
|
|
|
| 837 |
|
|
This option is the preferred way to isolate CPUs. The
|
| 838 |
|
|
alternative -- manually setting the CPU mask of all
|
| 839 |
|
|
tasks in the system -- can cause problems and
|
| 840 |
|
|
suboptimal load balancer performance.
|
| 841 |
|
|
|
| 842 |
|
|
iucv= [HW,NET]
|
| 843 |
|
|
|
| 844 |
|
|
js= [HW,JOY] Analog joystick
|
| 845 |
|
|
See Documentation/input/joystick.txt.
|
| 846 |
|
|
|
| 847 |
|
|
kernelcore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
|
| 848 |
|
|
specifies the amount of memory usable by the kernel
|
| 849 |
|
|
for non-movable allocations. The requested amount is
|
| 850 |
|
|
spread evenly throughout all nodes in the system. The
|
| 851 |
|
|
remaining memory in each node is used for Movable
|
| 852 |
|
|
pages. In the event, a node is too small to have both
|
| 853 |
|
|
kernelcore and Movable pages, kernelcore pages will
|
| 854 |
|
|
take priority and other nodes will have a larger number
|
| 855 |
|
|
of kernelcore pages. The Movable zone is used for the
|
| 856 |
|
|
allocation of pages that may be reclaimed or moved
|
| 857 |
|
|
by the page migration subsystem. This means that
|
| 858 |
|
|
HugeTLB pages may not be allocated from this zone.
|
| 859 |
|
|
Note that allocations like PTEs-from-HighMem still
|
| 860 |
|
|
use the HighMem zone if it exists, and the Normal
|
| 861 |
|
|
zone if it does not.
|
| 862 |
|
|
|
| 863 |
|
|
movablecore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
|
| 864 |
|
|
is similar to kernelcore except it specifies the
|
| 865 |
|
|
amount of memory used for migratable allocations.
|
| 866 |
|
|
If both kernelcore and movablecore is specified,
|
| 867 |
|
|
then kernelcore will be at *least* the specified
|
| 868 |
|
|
value but may be more. If movablecore on its own
|
| 869 |
|
|
is specified, the administrator must be careful
|
| 870 |
|
|
that the amount of memory usable for all allocations
|
| 871 |
|
|
is not too small.
|
| 872 |
|
|
|
| 873 |
|
|
keepinitrd [HW,ARM]
|
| 874 |
|
|
|
| 875 |
|
|
kstack=N [X86-32,X86-64] Print N words from the kernel stack
|
| 876 |
|
|
in oops dumps.
|
| 877 |
|
|
|
| 878 |
|
|
l2cr= [PPC]
|
| 879 |
|
|
|
| 880 |
|
|
lapic [X86-32,APIC] Enable the local APIC even if BIOS
|
| 881 |
|
|
disabled it.
|
| 882 |
|
|
|
| 883 |
|
|
lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in
|
| 884 |
|
|
C2 power state.
|
| 885 |
|
|
|
| 886 |
|
|
libata.dma= [LIBATA] DMA control
|
| 887 |
|
|
libata.dma=0 Disable all PATA and SATA DMA
|
| 888 |
|
|
libata.dma=1 PATA and SATA Disk DMA only
|
| 889 |
|
|
libata.dma=2 ATAPI (CDROM) DMA only
|
| 890 |
|
|
libata.dma=4 Compact Flash DMA only
|
| 891 |
|
|
Combinations also work, so libata.dma=3 enables DMA
|
| 892 |
|
|
for disks and CDROMs, but not CFs.
|
| 893 |
|
|
|
| 894 |
|
|
libata.noacpi [LIBATA] Disables use of ACPI in libata suspend/resume
|
| 895 |
|
|
when set.
|
| 896 |
|
|
Format:
|
| 897 |
|
|
|
| 898 |
|
|
load_ramdisk= [RAM] List of ramdisks to load from floppy
|
| 899 |
|
|
See Documentation/ramdisk.txt.
|
| 900 |
|
|
|
| 901 |
|
|
lockd.nlm_grace_period=P [NFS] Assign grace period.
|
| 902 |
|
|
Format:
|
| 903 |
|
|
|
| 904 |
|
|
lockd.nlm_tcpport=N [NFS] Assign TCP port.
|
| 905 |
|
|
Format:
|
| 906 |
|
|
|
| 907 |
|
|
lockd.nlm_timeout=T [NFS] Assign timeout value.
|
| 908 |
|
|
Format:
|
| 909 |
|
|
|
| 910 |
|
|
lockd.nlm_udpport=M [NFS] Assign UDP port.
|
| 911 |
|
|
Format:
|
| 912 |
|
|
|
| 913 |
|
|
logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver
|
| 914 |
|
|
Format:
|
| 915 |
|
|
|
| 916 |
|
|
loglevel= All Kernel Messages with a loglevel smaller than the
|
| 917 |
|
|
console loglevel will be printed to the console. It can
|
| 918 |
|
|
also be changed with klogd or other programs. The
|
| 919 |
|
|
loglevels are defined as follows:
|
| 920 |
|
|
|
| 921 |
|
|
|
| 922 |
|
|
1 (KERN_ALERT) action must be taken immediately
|
| 923 |
|
|
2 (KERN_CRIT) critical conditions
|
| 924 |
|
|
3 (KERN_ERR) error conditions
|
| 925 |
|
|
4 (KERN_WARNING) warning conditions
|
| 926 |
|
|
5 (KERN_NOTICE) normal but significant condition
|
| 927 |
|
|
6 (KERN_INFO) informational
|
| 928 |
|
|
7 (KERN_DEBUG) debug-level messages
|
| 929 |
|
|
|
| 930 |
|
|
log_buf_len=n Sets the size of the printk ring buffer, in bytes.
|
| 931 |
|
|
Format: { n | nk | nM }
|
| 932 |
|
|
n must be a power of two. The default size
|
| 933 |
|
|
is set in the kernel config file.
|
| 934 |
|
|
|
| 935 |
|
|
logo.nologo [FB] Disables display of the built-in Linux logo.
|
| 936 |
|
|
This may be used to provide more screen space for
|
| 937 |
|
|
kernel log messages and is useful when debugging
|
| 938 |
|
|
kernel boot problems.
|
| 939 |
|
|
|
| 940 |
|
|
lp=0 [LP] Specify parallel ports to use, e.g,
|
| 941 |
|
|
lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses
|
| 942 |
|
|
lp=reset first parallel port). 'lp=0' disables the
|
| 943 |
|
|
lp=auto printer driver. 'lp=reset' (which can be
|
| 944 |
|
|
specified in addition to the ports) causes
|
| 945 |
|
|
attached printers to be reset. Using
|
| 946 |
|
|
lp=port1,port2,... specifies the parallel ports
|
| 947 |
|
|
to associate lp devices with, starting with
|
| 948 |
|
|
lp0. A port specification may be 'none' to skip
|
| 949 |
|
|
that lp device, or a parport name such as
|
| 950 |
|
|
'parport0'. Specifying 'lp=auto' instead of a
|
| 951 |
|
|
port specification list means that device IDs
|
| 952 |
|
|
from each port should be examined, to see if
|
| 953 |
|
|
an IEEE 1284-compliant printer is attached; if
|
| 954 |
|
|
so, the driver will manage that printer.
|
| 955 |
|
|
See also header of drivers/char/lp.c.
|
| 956 |
|
|
|
| 957 |
|
|
lpj=n [KNL]
|
| 958 |
|
|
Sets loops_per_jiffy to given constant, thus avoiding
|
| 959 |
|
|
time-consuming boot-time autodetection (up to 250 ms per
|
| 960 |
|
|
CPU). 0 enables autodetection (default). To determine
|
| 961 |
|
|
the correct value for your kernel, boot with normal
|
| 962 |
|
|
autodetection and see what value is printed. Note that
|
| 963 |
|
|
on SMP systems the preset will be applied to all CPUs,
|
| 964 |
|
|
which is likely to cause problems if your CPUs need
|
| 965 |
|
|
significantly divergent settings. An incorrect value
|
| 966 |
|
|
will cause delays in the kernel to be wrong, leading to
|
| 967 |
|
|
unpredictable I/O errors and other breakage. Although
|
| 968 |
|
|
unlikely, in the extreme case this might damage your
|
| 969 |
|
|
hardware.
|
| 970 |
|
|
|
| 971 |
|
|
ltpc= [NET]
|
| 972 |
|
|
Format: ,,
|
| 973 |
|
|
|
| 974 |
|
|
mac5380= [HW,SCSI] Format:
|
| 975 |
|
|
,,,,
|
| 976 |
|
|
|
| 977 |
|
|
mac53c9x= [HW,SCSI] Format:
|
| 978 |
|
|
,,,,,,,
|
| 979 |
|
|
|
| 980 |
|
|
machvec= [IA64] Force the use of a particular machine-vector
|
| 981 |
|
|
(machvec) in a generic kernel.
|
| 982 |
|
|
Example: machvec=hpzx1_swiotlb
|
| 983 |
|
|
|
| 984 |
|
|
max_loop= [LOOP] Maximum number of loopback devices that can
|
| 985 |
|
|
be mounted
|
| 986 |
|
|
Format: <1-256>
|
| 987 |
|
|
|
| 988 |
|
|
maxcpus= [SMP] Maximum number of processors that an SMP kernel
|
| 989 |
|
|
should make use of. maxcpus=n : n >= 0 limits the
|
| 990 |
|
|
kernel to using 'n' processors. n=0 is a special case,
|
| 991 |
|
|
it is equivalent to "nosmp", which also disables
|
| 992 |
|
|
the IO APIC.
|
| 993 |
|
|
|
| 994 |
|
|
max_addr=[KMG] [KNL,BOOT,ia64] All physical memory greater than or
|
| 995 |
|
|
equal to this physical address is ignored.
|
| 996 |
|
|
|
| 997 |
|
|
max_luns= [SCSI] Maximum number of LUNs to probe.
|
| 998 |
|
|
Should be between 1 and 2^32-1.
|
| 999 |
|
|
|
| 1000 |
|
|
max_report_luns=
|
| 1001 |
|
|
[SCSI] Maximum number of LUNs received.
|
| 1002 |
|
|
Should be between 1 and 16384.
|
| 1003 |
|
|
|
| 1004 |
|
|
mca-pentium [BUGS=X86-32]
|
| 1005 |
|
|
|
| 1006 |
|
|
mcatest= [IA-64]
|
| 1007 |
|
|
|
| 1008 |
|
|
mce [X86-32] Machine Check Exception
|
| 1009 |
|
|
|
| 1010 |
|
|
mce=option [X86-64] See Documentation/x86_64/boot-options.txt
|
| 1011 |
|
|
|
| 1012 |
|
|
md= [HW] RAID subsystems devices and level
|
| 1013 |
|
|
See Documentation/md.txt.
|
| 1014 |
|
|
|
| 1015 |
|
|
mdacon= [MDA]
|
| 1016 |
|
|
Format: ,
|
| 1017 |
|
|
Specifies range of consoles to be captured by the MDA.
|
| 1018 |
|
|
|
| 1019 |
|
|
mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
|
| 1020 |
|
|
Amount of memory to be used when the kernel is not able
|
| 1021 |
|
|
to see the whole system memory or for test.
|
| 1022 |
|
|
[X86-32] Use together with memmap= to avoid physical
|
| 1023 |
|
|
address space collisions. Without memmap= PCI devices
|
| 1024 |
|
|
could be placed at addresses belonging to unused RAM.
|
| 1025 |
|
|
|
| 1026 |
|
|
mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
|
| 1027 |
|
|
memory.
|
| 1028 |
|
|
|
| 1029 |
|
|
memmap=exactmap [KNL,X86-32,X86_64] Enable setting of an exact
|
| 1030 |
|
|
E820 memory map, as specified by the user.
|
| 1031 |
|
|
Such memmap=exactmap lines can be constructed based on
|
| 1032 |
|
|
BIOS output or other requirements. See the memmap=nn@ss
|
| 1033 |
|
|
option description.
|
| 1034 |
|
|
|
| 1035 |
|
|
memmap=nn[KMG]@ss[KMG]
|
| 1036 |
|
|
[KNL] Force usage of a specific region of memory
|
| 1037 |
|
|
Region of memory to be used, from ss to ss+nn.
|
| 1038 |
|
|
|
| 1039 |
|
|
memmap=nn[KMG]#ss[KMG]
|
| 1040 |
|
|
[KNL,ACPI] Mark specific memory as ACPI data.
|
| 1041 |
|
|
Region of memory to be used, from ss to ss+nn.
|
| 1042 |
|
|
|
| 1043 |
|
|
memmap=nn[KMG]$ss[KMG]
|
| 1044 |
|
|
[KNL,ACPI] Mark specific memory as reserved.
|
| 1045 |
|
|
Region of memory to be used, from ss to ss+nn.
|
| 1046 |
|
|
|
| 1047 |
|
|
meye.*= [HW] Set MotionEye Camera parameters
|
| 1048 |
|
|
See Documentation/video4linux/meye.txt.
|
| 1049 |
|
|
|
| 1050 |
|
|
mfgpt_irq= [IA-32] Specify the IRQ to use for the
|
| 1051 |
|
|
Multi-Function General Purpose Timers on AMD Geode
|
| 1052 |
|
|
platforms.
|
| 1053 |
|
|
|
| 1054 |
|
|
mga= [HW,DRM]
|
| 1055 |
|
|
|
| 1056 |
|
|
mousedev.tap_time=
|
| 1057 |
|
|
[MOUSE] Maximum time between finger touching and
|
| 1058 |
|
|
leaving touchpad surface for touch to be considered
|
| 1059 |
|
|
a tap and be reported as a left button click (for
|
| 1060 |
|
|
touchpads working in absolute mode only).
|
| 1061 |
|
|
Format:
|
| 1062 |
|
|
mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices
|
| 1063 |
|
|
reporting absolute coordinates, such as tablets
|
| 1064 |
|
|
mousedev.yres= [MOUSE] Vertical screen resolution, used for devices
|
| 1065 |
|
|
reporting absolute coordinates, such as tablets
|
| 1066 |
|
|
|
| 1067 |
|
|
mpu401= [HW,OSS]
|
| 1068 |
|
|
Format: ,
|
| 1069 |
|
|
|
| 1070 |
|
|
MTD_Partition= [MTD]
|
| 1071 |
|
|
Format: ,,,
|
| 1072 |
|
|
|
| 1073 |
|
|
MTD_Region= [MTD] Format:
|
| 1074 |
|
|
,[,,,,]
|
| 1075 |
|
|
|
| 1076 |
|
|
mtdparts= [MTD]
|
| 1077 |
|
|
See drivers/mtd/cmdlinepart.c.
|
| 1078 |
|
|
|
| 1079 |
|
|
mtouchusb.raw_coordinates=
|
| 1080 |
|
|
[HW] Make the MicroTouch USB driver use raw coordinates
|
| 1081 |
|
|
('y', default) or cooked coordinates ('n')
|
| 1082 |
|
|
|
| 1083 |
|
|
n2= [NET] SDL Inc. RISCom/N2 synchronous serial card
|
| 1084 |
|
|
|
| 1085 |
|
|
NCR_D700= [HW,SCSI]
|
| 1086 |
|
|
See header of drivers/scsi/NCR_D700.c.
|
| 1087 |
|
|
|
| 1088 |
|
|
ncr5380= [HW,SCSI]
|
| 1089 |
|
|
|
| 1090 |
|
|
ncr53c400= [HW,SCSI]
|
| 1091 |
|
|
|
| 1092 |
|
|
ncr53c400a= [HW,SCSI]
|
| 1093 |
|
|
|
| 1094 |
|
|
ncr53c406a= [HW,SCSI]
|
| 1095 |
|
|
|
| 1096 |
|
|
ncr53c8xx= [HW,SCSI]
|
| 1097 |
|
|
|
| 1098 |
|
|
netdev= [NET] Network devices parameters
|
| 1099 |
|
|
Format: ,,,,
|
| 1100 |
|
|
Note that mem_start is often overloaded to mean
|
| 1101 |
|
|
something different and driver-specific.
|
| 1102 |
|
|
This usage is only documented in each driver source
|
| 1103 |
|
|
file if at all.
|
| 1104 |
|
|
|
| 1105 |
|
|
nfsaddrs= [NFS]
|
| 1106 |
|
|
See Documentation/nfsroot.txt.
|
| 1107 |
|
|
|
| 1108 |
|
|
nfsroot= [NFS] nfs root filesystem for disk-less boxes.
|
| 1109 |
|
|
See Documentation/nfsroot.txt.
|
| 1110 |
|
|
|
| 1111 |
|
|
nfs.callback_tcpport=
|
| 1112 |
|
|
[NFS] set the TCP port on which the NFSv4 callback
|
| 1113 |
|
|
channel should listen.
|
| 1114 |
|
|
|
| 1115 |
|
|
nfs.idmap_cache_timeout=
|
| 1116 |
|
|
[NFS] set the maximum lifetime for idmapper cache
|
| 1117 |
|
|
entries.
|
| 1118 |
|
|
|
| 1119 |
|
|
nfs.enable_ino64=
|
| 1120 |
|
|
[NFS] enable 64-bit inode numbers.
|
| 1121 |
|
|
If zero, the NFS client will fake up a 32-bit inode
|
| 1122 |
|
|
number for the readdir() and stat() syscalls instead
|
| 1123 |
|
|
of returning the full 64-bit number.
|
| 1124 |
|
|
The default is to return 64-bit inode numbers.
|
| 1125 |
|
|
|
| 1126 |
|
|
nmi_watchdog= [KNL,BUGS=X86-32] Debugging features for SMP kernels
|
| 1127 |
|
|
|
| 1128 |
|
|
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
|
| 1129 |
|
|
emulation library even if a 387 maths coprocessor
|
| 1130 |
|
|
is present.
|
| 1131 |
|
|
|
| 1132 |
|
|
noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
|
| 1133 |
|
|
caches in the slab allocator. Saves per-node memory,
|
| 1134 |
|
|
but will impact performance.
|
| 1135 |
|
|
|
| 1136 |
|
|
noalign [KNL,ARM]
|
| 1137 |
|
|
|
| 1138 |
|
|
noapic [SMP,APIC] Tells the kernel to not make use of any
|
| 1139 |
|
|
IOAPICs that may be present in the system.
|
| 1140 |
|
|
|
| 1141 |
|
|
nobats [PPC] Do not use BATs for mapping kernel lowmem
|
| 1142 |
|
|
on "Classic" PPC cores.
|
| 1143 |
|
|
|
| 1144 |
|
|
nocache [ARM]
|
| 1145 |
|
|
|
| 1146 |
|
|
nodelayacct [KNL] Disable per-task delay accounting
|
| 1147 |
|
|
|
| 1148 |
|
|
nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects.
|
| 1149 |
|
|
|
| 1150 |
|
|
noexec [IA-64]
|
| 1151 |
|
|
|
| 1152 |
|
|
noexec [X86-32,X86-64]
|
| 1153 |
|
|
noexec=on: enable non-executable mappings (default)
|
| 1154 |
|
|
noexec=off: disable nn-executable mappings
|
| 1155 |
|
|
|
| 1156 |
|
|
nofxsr [BUGS=X86-32] Disables x86 floating point extended
|
| 1157 |
|
|
register save and restore. The kernel will only save
|
| 1158 |
|
|
legacy floating-point registers on task switch.
|
| 1159 |
|
|
|
| 1160 |
|
|
nohlt [BUGS=ARM]
|
| 1161 |
|
|
|
| 1162 |
|
|
no-hlt [BUGS=X86-32] Tells the kernel that the hlt
|
| 1163 |
|
|
instruction doesn't work correctly and not to
|
| 1164 |
|
|
use it.
|
| 1165 |
|
|
|
| 1166 |
|
|
nohalt [IA-64] Tells the kernel not to use the power saving
|
| 1167 |
|
|
function PAL_HALT_LIGHT when idle. This increases
|
| 1168 |
|
|
power-consumption. On the positive side, it reduces
|
| 1169 |
|
|
interrupt wake-up latency, which may improve performance
|
| 1170 |
|
|
in certain environments such as networked servers or
|
| 1171 |
|
|
real-time systems.
|
| 1172 |
|
|
|
| 1173 |
|
|
nohz= [KNL] Boottime enable/disable dynamic ticks
|
| 1174 |
|
|
Valid arguments: on, off
|
| 1175 |
|
|
Default: on
|
| 1176 |
|
|
|
| 1177 |
|
|
noirqbalance [X86-32,SMP,KNL] Disable kernel irq balancing
|
| 1178 |
|
|
|
| 1179 |
|
|
noirqdebug [X86-32] Disables the code which attempts to detect and
|
| 1180 |
|
|
disable unhandled interrupt sources.
|
| 1181 |
|
|
|
| 1182 |
|
|
no_timer_check [X86-32,X86_64,APIC] Disables the code which tests for
|
| 1183 |
|
|
broken timer IRQ sources.
|
| 1184 |
|
|
|
| 1185 |
|
|
noisapnp [ISAPNP] Disables ISA PnP code.
|
| 1186 |
|
|
|
| 1187 |
|
|
noinitrd [RAM] Tells the kernel not to load any configured
|
| 1188 |
|
|
initial RAM disk.
|
| 1189 |
|
|
|
| 1190 |
|
|
nointroute [IA-64]
|
| 1191 |
|
|
|
| 1192 |
|
|
nojitter [IA64] Disables jitter checking for ITC timers.
|
| 1193 |
|
|
|
| 1194 |
|
|
nolapic [X86-32,APIC] Do not enable or use the local APIC.
|
| 1195 |
|
|
|
| 1196 |
|
|
nolapic_timer [X86-32,APIC] Do not use the local APIC timer.
|
| 1197 |
|
|
|
| 1198 |
|
|
noltlbs [PPC] Do not use large page/tlb entries for kernel
|
| 1199 |
|
|
lowmem mapping on PPC40x.
|
| 1200 |
|
|
|
| 1201 |
|
|
nomca [IA-64] Disable machine check abort handling
|
| 1202 |
|
|
|
| 1203 |
|
|
nomce [X86-32] Machine Check Exception
|
| 1204 |
|
|
|
| 1205 |
|
|
nomfgpt [X86-32] Disable Multi-Function General Purpose
|
| 1206 |
|
|
Timer usage (for AMD Geode machines).
|
| 1207 |
|
|
|
| 1208 |
|
|
noreplace-paravirt [X86-32,PV_OPS] Don't patch paravirt_ops
|
| 1209 |
|
|
|
| 1210 |
|
|
noreplace-smp [X86-32,SMP] Don't replace SMP instructions
|
| 1211 |
|
|
with UP alternatives
|
| 1212 |
|
|
|
| 1213 |
|
|
noresidual [PPC] Don't use residual data on PReP machines.
|
| 1214 |
|
|
|
| 1215 |
|
|
noresume [SWSUSP] Disables resume and restores original swap
|
| 1216 |
|
|
space.
|
| 1217 |
|
|
|
| 1218 |
|
|
no-scroll [VGA] Disables scrollback.
|
| 1219 |
|
|
This is required for the Braillex ib80-piezo Braille
|
| 1220 |
|
|
reader made by F.H. Papenmeier (Germany).
|
| 1221 |
|
|
|
| 1222 |
|
|
nosbagart [IA-64]
|
| 1223 |
|
|
|
| 1224 |
|
|
nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
|
| 1225 |
|
|
|
| 1226 |
|
|
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
|
| 1227 |
|
|
and disable the IO APIC. legacy for "maxcpus=0".
|
| 1228 |
|
|
|
| 1229 |
|
|
nosoftlockup [KNL] Disable the soft-lockup detector.
|
| 1230 |
|
|
|
| 1231 |
|
|
nosync [HW,M68K] Disables sync negotiation for all devices.
|
| 1232 |
|
|
|
| 1233 |
|
|
notsc [BUGS=X86-32] Disable Time Stamp Counter
|
| 1234 |
|
|
|
| 1235 |
|
|
nousb [USB] Disable the USB subsystem
|
| 1236 |
|
|
|
| 1237 |
|
|
nowb [ARM]
|
| 1238 |
|
|
|
| 1239 |
|
|
numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
|
| 1240 |
|
|
one of ['zone', 'node', 'default'] can be specified
|
| 1241 |
|
|
This can be set from sysctl after boot.
|
| 1242 |
|
|
See Documentation/sysctl/vm.txt for details.
|
| 1243 |
|
|
|
| 1244 |
|
|
nr_uarts= [SERIAL] maximum number of UARTs to be registered.
|
| 1245 |
|
|
|
| 1246 |
|
|
opl3= [HW,OSS]
|
| 1247 |
|
|
Format:
|
| 1248 |
|
|
|
| 1249 |
|
|
oprofile.timer= [HW]
|
| 1250 |
|
|
Use timer interrupt instead of performance counters
|
| 1251 |
|
|
|
| 1252 |
|
|
osst= [HW,SCSI] SCSI Tape Driver
|
| 1253 |
|
|
Format: ,
|
| 1254 |
|
|
See also Documentation/scsi/st.txt.
|
| 1255 |
|
|
|
| 1256 |
|
|
panic= [KNL] Kernel behaviour on panic
|
| 1257 |
|
|
Format:
|
| 1258 |
|
|
|
| 1259 |
|
|
parkbd.port= [HW] Parallel port number the keyboard adapter is
|
| 1260 |
|
|
connected to, default is 0.
|
| 1261 |
|
|
Format:
|
| 1262 |
|
|
parkbd.mode= [HW] Parallel port keyboard adapter mode of operation,
|
| 1263 |
|
|
|
| 1264 |
|
|
Format:
|
| 1265 |
|
|
|
| 1266 |
|
|
parport= [HW,PPT] Specify parallel ports. 0 disables.
|
| 1267 |
|
|
Format: { 0 | auto | 0xBBB[,IRQ[,DMA]] }
|
| 1268 |
|
|
Use 'auto' to force the driver to use any
|
| 1269 |
|
|
IRQ/DMA settings detected (the default is to
|
| 1270 |
|
|
ignore detected IRQ/DMA settings because of
|
| 1271 |
|
|
possible conflicts). You can specify the base
|
| 1272 |
|
|
address, IRQ, and DMA settings; IRQ and DMA
|
| 1273 |
|
|
should be numbers, or 'auto' (for using detected
|
| 1274 |
|
|
settings on that particular port), or 'nofifo'
|
| 1275 |
|
|
(to avoid using a FIFO even if it is detected).
|
| 1276 |
|
|
Parallel ports are assigned in the order they
|
| 1277 |
|
|
are specified on the command line, starting
|
| 1278 |
|
|
with parport0.
|
| 1279 |
|
|
|
| 1280 |
|
|
parport_init_mode= [HW,PPT]
|
| 1281 |
|
|
Configure VIA parallel port to operate in
|
| 1282 |
|
|
a specific mode. This is necessary on Pegasos
|
| 1283 |
|
|
computer where firmware has no options for setting
|
| 1284 |
|
|
up parallel port mode and sets it to spp.
|
| 1285 |
|
|
Currently this function knows 686a and 8231 chips.
|
| 1286 |
|
|
Format: [spp|ps2|epp|ecp|ecpepp]
|
| 1287 |
|
|
|
| 1288 |
|
|
pas2= [HW,OSS] Format:
|
| 1289 |
|
|
,,,,,,,
|
| 1290 |
|
|
|
| 1291 |
|
|
pas16= [HW,SCSI]
|
| 1292 |
|
|
See header of drivers/scsi/pas16.c.
|
| 1293 |
|
|
|
| 1294 |
|
|
pause_on_oops=
|
| 1295 |
|
|
Halt all CPUs after the first oops has been printed for
|
| 1296 |
|
|
the specified number of seconds. This is to be used if
|
| 1297 |
|
|
your oopses keep scrolling off the screen.
|
| 1298 |
|
|
|
| 1299 |
|
|
pcbit= [HW,ISDN]
|
| 1300 |
|
|
|
| 1301 |
|
|
pcd. [PARIDE]
|
| 1302 |
|
|
See header of drivers/block/paride/pcd.c.
|
| 1303 |
|
|
See also Documentation/paride.txt.
|
| 1304 |
|
|
|
| 1305 |
|
|
pci=option[,option...] [PCI] various PCI subsystem options:
|
| 1306 |
|
|
off [X86-32] don't probe for the PCI bus
|
| 1307 |
|
|
bios [X86-32] force use of PCI BIOS, don't access
|
| 1308 |
|
|
the hardware directly. Use this if your machine
|
| 1309 |
|
|
has a non-standard PCI host bridge.
|
| 1310 |
|
|
nobios [X86-32] disallow use of PCI BIOS, only direct
|
| 1311 |
|
|
hardware access methods are allowed. Use this
|
| 1312 |
|
|
if you experience crashes upon bootup and you
|
| 1313 |
|
|
suspect they are caused by the BIOS.
|
| 1314 |
|
|
conf1 [X86-32] Force use of PCI Configuration
|
| 1315 |
|
|
Mechanism 1.
|
| 1316 |
|
|
conf2 [X86-32] Force use of PCI Configuration
|
| 1317 |
|
|
Mechanism 2.
|
| 1318 |
|
|
noaer [PCIE] If the PCIEAER kernel config parameter is
|
| 1319 |
|
|
enabled, this kernel boot option can be used to
|
| 1320 |
|
|
disable the use of PCIE advanced error reporting.
|
| 1321 |
|
|
nodomains [PCI] Disable support for multiple PCI
|
| 1322 |
|
|
root domains (aka PCI segments, in ACPI-speak).
|
| 1323 |
|
|
nommconf [X86-32,X86_64] Disable use of MMCONFIG for PCI
|
| 1324 |
|
|
Configuration
|
| 1325 |
|
|
nomsi [MSI] If the PCI_MSI kernel config parameter is
|
| 1326 |
|
|
enabled, this kernel boot option can be used to
|
| 1327 |
|
|
disable the use of MSI interrupts system-wide.
|
| 1328 |
|
|
nosort [X86-32] Don't sort PCI devices according to
|
| 1329 |
|
|
order given by the PCI BIOS. This sorting is
|
| 1330 |
|
|
done to get a device order compatible with
|
| 1331 |
|
|
older kernels.
|
| 1332 |
|
|
biosirq [X86-32] Use PCI BIOS calls to get the interrupt
|
| 1333 |
|
|
routing table. These calls are known to be buggy
|
| 1334 |
|
|
on several machines and they hang the machine
|
| 1335 |
|
|
when used, but on other computers it's the only
|
| 1336 |
|
|
way to get the interrupt routing table. Try
|
| 1337 |
|
|
this option if the kernel is unable to allocate
|
| 1338 |
|
|
IRQs or discover secondary PCI buses on your
|
| 1339 |
|
|
motherboard.
|
| 1340 |
|
|
rom [X86-32] Assign address space to expansion ROMs.
|
| 1341 |
|
|
Use with caution as certain devices share
|
| 1342 |
|
|
address decoders between ROMs and other
|
| 1343 |
|
|
resources.
|
| 1344 |
|
|
irqmask=0xMMMM [X86-32] Set a bit mask of IRQs allowed to be
|
| 1345 |
|
|
assigned automatically to PCI devices. You can
|
| 1346 |
|
|
make the kernel exclude IRQs of your ISA cards
|
| 1347 |
|
|
this way.
|
| 1348 |
|
|
pirqaddr=0xAAAAA [X86-32] Specify the physical address
|
| 1349 |
|
|
of the PIRQ table (normally generated
|
| 1350 |
|
|
by the BIOS) if it is outside the
|
| 1351 |
|
|
F0000h-100000h range.
|
| 1352 |
|
|
lastbus=N [X86-32] Scan all buses thru bus #N. Can be
|
| 1353 |
|
|
useful if the kernel is unable to find your
|
| 1354 |
|
|
secondary buses and you want to tell it
|
| 1355 |
|
|
explicitly which ones they are.
|
| 1356 |
|
|
assign-busses [X86-32] Always assign all PCI bus
|
| 1357 |
|
|
numbers ourselves, overriding
|
| 1358 |
|
|
whatever the firmware may have done.
|
| 1359 |
|
|
usepirqmask [X86-32] Honor the possible IRQ mask stored
|
| 1360 |
|
|
in the BIOS $PIR table. This is needed on
|
| 1361 |
|
|
some systems with broken BIOSes, notably
|
| 1362 |
|
|
some HP Pavilion N5400 and Omnibook XE3
|
| 1363 |
|
|
notebooks. This will have no effect if ACPI
|
| 1364 |
|
|
IRQ routing is enabled.
|
| 1365 |
|
|
noacpi [X86-32] Do not use ACPI for IRQ routing
|
| 1366 |
|
|
or for PCI scanning.
|
| 1367 |
|
|
use_crs [X86-32] Use _CRS for PCI resource
|
| 1368 |
|
|
allocation.
|
| 1369 |
|
|
routeirq Do IRQ routing for all PCI devices.
|
| 1370 |
|
|
This is normally done in pci_enable_device(),
|
| 1371 |
|
|
so this option is a temporary workaround
|
| 1372 |
|
|
for broken drivers that don't call it.
|
| 1373 |
|
|
firmware [ARM] Do not re-enumerate the bus but instead
|
| 1374 |
|
|
just use the configuration from the
|
| 1375 |
|
|
bootloader. This is currently used on
|
| 1376 |
|
|
IXP2000 systems where the bus has to be
|
| 1377 |
|
|
configured a certain way for adjunct CPUs.
|
| 1378 |
|
|
noearly [X86] Don't do any early type 1 scanning.
|
| 1379 |
|
|
This might help on some broken boards which
|
| 1380 |
|
|
machine check when some devices' config space
|
| 1381 |
|
|
is read. But various workarounds are disabled
|
| 1382 |
|
|
and some IOMMU drivers will not work.
|
| 1383 |
|
|
bfsort Sort PCI devices into breadth-first order.
|
| 1384 |
|
|
This sorting is done to get a device
|
| 1385 |
|
|
order compatible with older (<= 2.4) kernels.
|
| 1386 |
|
|
nobfsort Don't sort PCI devices into breadth-first order.
|
| 1387 |
|
|
cbiosize=nn[KMG] The fixed amount of bus space which is
|
| 1388 |
|
|
reserved for the CardBus bridge's IO window.
|
| 1389 |
|
|
The default value is 256 bytes.
|
| 1390 |
|
|
cbmemsize=nn[KMG] The fixed amount of bus space which is
|
| 1391 |
|
|
reserved for the CardBus bridge's memory
|
| 1392 |
|
|
window. The default value is 64 megabytes.
|
| 1393 |
|
|
|
| 1394 |
|
|
pcmv= [HW,PCMCIA] BadgePAD 4
|
| 1395 |
|
|
|
| 1396 |
|
|
pd. [PARIDE]
|
| 1397 |
|
|
See Documentation/paride.txt.
|
| 1398 |
|
|
|
| 1399 |
|
|
pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at
|
| 1400 |
|
|
boot time.
|
| 1401 |
|
|
Format: { 0 | 1 }
|
| 1402 |
|
|
See arch/parisc/kernel/pdc_chassis.c
|
| 1403 |
|
|
|
| 1404 |
|
|
pf. [PARIDE]
|
| 1405 |
|
|
See Documentation/paride.txt.
|
| 1406 |
|
|
|
| 1407 |
|
|
pg. [PARIDE]
|
| 1408 |
|
|
See Documentation/paride.txt.
|
| 1409 |
|
|
|
| 1410 |
|
|
pirq= [SMP,APIC] Manual mp-table setup
|
| 1411 |
|
|
See Documentation/i386/IO-APIC.txt.
|
| 1412 |
|
|
|
| 1413 |
|
|
plip= [PPT,NET] Parallel port network link
|
| 1414 |
|
|
Format: { parport | timid | 0 }
|
| 1415 |
|
|
See also Documentation/parport.txt.
|
| 1416 |
|
|
|
| 1417 |
|
|
pnpacpi= [ACPI]
|
| 1418 |
|
|
{ off }
|
| 1419 |
|
|
|
| 1420 |
|
|
pnpbios= [ISAPNP]
|
| 1421 |
|
|
{ on | off | curr | res | no-curr | no-res }
|
| 1422 |
|
|
|
| 1423 |
|
|
pnp_reserve_irq=
|
| 1424 |
|
|
[ISAPNP] Exclude IRQs for the autoconfiguration
|
| 1425 |
|
|
|
| 1426 |
|
|
pnp_reserve_dma=
|
| 1427 |
|
|
[ISAPNP] Exclude DMAs for the autoconfiguration
|
| 1428 |
|
|
|
| 1429 |
|
|
pnp_reserve_io= [ISAPNP] Exclude I/O ports for the autoconfiguration
|
| 1430 |
|
|
Ranges are in pairs (I/O port base and size).
|
| 1431 |
|
|
|
| 1432 |
|
|
pnp_reserve_mem=
|
| 1433 |
|
|
[ISAPNP] Exclude memory regions for the
|
| 1434 |
|
|
autoconfiguration.
|
| 1435 |
|
|
Ranges are in pairs (memory base and size).
|
| 1436 |
|
|
|
| 1437 |
|
|
print-fatal-signals=
|
| 1438 |
|
|
[KNL] debug: print fatal signals
|
| 1439 |
|
|
print-fatal-signals=1: print segfault info to
|
| 1440 |
|
|
the kernel console.
|
| 1441 |
|
|
default: off.
|
| 1442 |
|
|
|
| 1443 |
|
|
printk.time= Show timing data prefixed to each printk message line
|
| 1444 |
|
|
Format: (1/Y/y=enable, 0/N/n=disable)
|
| 1445 |
|
|
|
| 1446 |
|
|
profile= [KNL] Enable kernel profiling via /proc/profile
|
| 1447 |
|
|
Format: [schedule,]
|
| 1448 |
|
|
Param: "schedule" - profile schedule points.
|
| 1449 |
|
|
Param: - step/bucket size as a power of 2 for
|
| 1450 |
|
|
statistical time based profiling.
|
| 1451 |
|
|
Param: "sleep" - profile D-state sleeping (millisecs).
|
| 1452 |
|
|
Requires CONFIG_SCHEDSTATS
|
| 1453 |
|
|
Param: "kvm" - profile VM exits.
|
| 1454 |
|
|
|
| 1455 |
|
|
processor.max_cstate= [HW,ACPI]
|
| 1456 |
|
|
Limit processor to maximum C-state
|
| 1457 |
|
|
max_cstate=9 overrides any DMI blacklist limit.
|
| 1458 |
|
|
|
| 1459 |
|
|
processor.nocst [HW,ACPI]
|
| 1460 |
|
|
Ignore the _CST method to determine C-states,
|
| 1461 |
|
|
instead using the legacy FADT method
|
| 1462 |
|
|
|
| 1463 |
|
|
prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
|
| 1464 |
|
|
before loading.
|
| 1465 |
|
|
See Documentation/ramdisk.txt.
|
| 1466 |
|
|
|
| 1467 |
|
|
psmouse.proto= [HW,MOUSE] Highest PS2 mouse protocol extension to
|
| 1468 |
|
|
probe for; one of (bare|imps|exps|lifebook|any).
|
| 1469 |
|
|
psmouse.rate= [HW,MOUSE] Set desired mouse report rate, in reports
|
| 1470 |
|
|
per second.
|
| 1471 |
|
|
psmouse.resetafter= [HW,MOUSE]
|
| 1472 |
|
|
Try to reset the device after so many bad packets
|
| 1473 |
|
|
(0 = never).
|
| 1474 |
|
|
psmouse.resolution=
|
| 1475 |
|
|
[HW,MOUSE] Set desired mouse resolution, in dpi.
|
| 1476 |
|
|
psmouse.smartscroll=
|
| 1477 |
|
|
[HW,MOUSE] Controls Logitech smartscroll autorepeat.
|
| 1478 |
|
|
|
| 1479 |
|
|
|
| 1480 |
|
|
pss= [HW,OSS] Personal Sound System (ECHO ESC614)
|
| 1481 |
|
|
Format:
|
| 1482 |
|
|
,,,,,
|
| 1483 |
|
|
|
| 1484 |
|
|
pt. [PARIDE]
|
| 1485 |
|
|
See Documentation/paride.txt.
|
| 1486 |
|
|
|
| 1487 |
|
|
pty.legacy_count=
|
| 1488 |
|
|
[KNL] Number of legacy pty's. Overwrites compiled-in
|
| 1489 |
|
|
default number.
|
| 1490 |
|
|
|
| 1491 |
|
|
quiet [KNL] Disable most log messages
|
| 1492 |
|
|
|
| 1493 |
|
|
r128= [HW,DRM]
|
| 1494 |
|
|
|
| 1495 |
|
|
raid= [HW,RAID]
|
| 1496 |
|
|
See Documentation/md.txt.
|
| 1497 |
|
|
|
| 1498 |
|
|
ramdisk_blocksize= [RAM]
|
| 1499 |
|
|
See Documentation/ramdisk.txt.
|
| 1500 |
|
|
|
| 1501 |
|
|
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
|
| 1502 |
|
|
See Documentation/ramdisk.txt.
|
| 1503 |
|
|
|
| 1504 |
|
|
rcu.blimit= [KNL,BOOT] Set maximum number of finished
|
| 1505 |
|
|
RCU callbacks to process in one batch.
|
| 1506 |
|
|
|
| 1507 |
|
|
rcu.qhimark= [KNL,BOOT] Set threshold of queued
|
| 1508 |
|
|
RCU callbacks over which batch limiting is disabled.
|
| 1509 |
|
|
|
| 1510 |
|
|
rcu.qlowmark= [KNL,BOOT] Set threshold of queued
|
| 1511 |
|
|
RCU callbacks below which batch limiting is re-enabled.
|
| 1512 |
|
|
|
| 1513 |
|
|
rdinit= [KNL]
|
| 1514 |
|
|
Format:
|
| 1515 |
|
|
Run specified binary instead of /init from the ramdisk,
|
| 1516 |
|
|
used for early userspace startup. See initrd.
|
| 1517 |
|
|
|
| 1518 |
|
|
reboot= [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
|
| 1519 |
|
|
Format: [,[,...]]
|
| 1520 |
|
|
See arch/*/kernel/reboot.c or arch/*/kernel/process.c
|
| 1521 |
|
|
|
| 1522 |
|
|
reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
|
| 1523 |
|
|
|
| 1524 |
|
|
reservetop= [X86-32]
|
| 1525 |
|
|
Format: nn[KMG]
|
| 1526 |
|
|
Reserves a hole at the top of the kernel virtual
|
| 1527 |
|
|
address space.
|
| 1528 |
|
|
|
| 1529 |
|
|
reset_devices [KNL] Force drivers to reset the underlying device
|
| 1530 |
|
|
during initialization.
|
| 1531 |
|
|
|
| 1532 |
|
|
resume= [SWSUSP]
|
| 1533 |
|
|
Specify the partition device for software suspend
|
| 1534 |
|
|
|
| 1535 |
|
|
resume_offset= [SWSUSP]
|
| 1536 |
|
|
Specify the offset from the beginning of the partition
|
| 1537 |
|
|
given by "resume=" at which the swap header is located,
|
| 1538 |
|
|
in units (needed only for swap files).
|
| 1539 |
|
|
See Documentation/power/swsusp-and-swap-files.txt
|
| 1540 |
|
|
|
| 1541 |
|
|
retain_initrd [RAM] Keep initrd memory after extraction
|
| 1542 |
|
|
|
| 1543 |
|
|
rhash_entries= [KNL,NET]
|
| 1544 |
|
|
Set number of hash buckets for route cache
|
| 1545 |
|
|
|
| 1546 |
|
|
riscom8= [HW,SERIAL]
|
| 1547 |
|
|
Format: [,[,...]]
|
| 1548 |
|
|
|
| 1549 |
|
|
ro [KNL] Mount root device read-only on boot
|
| 1550 |
|
|
|
| 1551 |
|
|
root= [KNL] Root filesystem
|
| 1552 |
|
|
|
| 1553 |
|
|
rootdelay= [KNL] Delay (in seconds) to pause before attempting to
|
| 1554 |
|
|
mount the root filesystem
|
| 1555 |
|
|
|
| 1556 |
|
|
rootflags= [KNL] Set root filesystem mount option string
|
| 1557 |
|
|
|
| 1558 |
|
|
rootfstype= [KNL] Set root filesystem type
|
| 1559 |
|
|
|
| 1560 |
|
|
rootwait [KNL] Wait (indefinitely) for root device to show up.
|
| 1561 |
|
|
Useful for devices that are detected asynchronously
|
| 1562 |
|
|
(e.g. USB and MMC devices).
|
| 1563 |
|
|
|
| 1564 |
|
|
root_plug.vendor_id=
|
| 1565 |
|
|
[ROOTPLUG] Override the default vendor ID
|
| 1566 |
|
|
|
| 1567 |
|
|
root_plug.product_id=
|
| 1568 |
|
|
[ROOTPLUG] Override the default product ID
|
| 1569 |
|
|
|
| 1570 |
|
|
root_plug.debug=
|
| 1571 |
|
|
[ROOTPLUG] Enable debugging output
|
| 1572 |
|
|
|
| 1573 |
|
|
rw [KNL] Mount root device read-write on boot
|
| 1574 |
|
|
|
| 1575 |
|
|
S [KNL] Run init in single mode
|
| 1576 |
|
|
|
| 1577 |
|
|
sa1100ir [NET]
|
| 1578 |
|
|
See drivers/net/irda/sa1100_ir.c.
|
| 1579 |
|
|
|
| 1580 |
|
|
sbni= [NET] Granch SBNI12 leased line adapter
|
| 1581 |
|
|
|
| 1582 |
|
|
sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver
|
| 1583 |
|
|
Format: [,[,]]
|
| 1584 |
|
|
|
| 1585 |
|
|
scsi_debug_*= [SCSI]
|
| 1586 |
|
|
See drivers/scsi/scsi_debug.c.
|
| 1587 |
|
|
|
| 1588 |
|
|
scsi_default_dev_flags=
|
| 1589 |
|
|
[SCSI] SCSI default device flags
|
| 1590 |
|
|
Format:
|
| 1591 |
|
|
|
| 1592 |
|
|
scsi_dev_flags= [SCSI] Black/white list entry for vendor and model
|
| 1593 |
|
|
Format: ::
|
| 1594 |
|
|
(flags are integer value)
|
| 1595 |
|
|
|
| 1596 |
|
|
scsi_logging= [SCSI]
|
| 1597 |
|
|
|
| 1598 |
|
|
scsi_mod.scan= [SCSI] sync (default) scans SCSI busses as they are
|
| 1599 |
|
|
discovered. async scans them in kernel threads,
|
| 1600 |
|
|
allowing boot to proceed. none ignores them, expecting
|
| 1601 |
|
|
user space to do the scan.
|
| 1602 |
|
|
|
| 1603 |
|
|
selinux [SELINUX] Disable or enable SELinux at boot time.
|
| 1604 |
|
|
Format: { "0" | "1" }
|
| 1605 |
|
|
See security/selinux/Kconfig help text.
|
| 1606 |
|
|
|
| 1607 |
|
|
1 -- enable.
|
| 1608 |
|
|
Default value is set via kernel config option.
|
| 1609 |
|
|
If enabled at boot time, /selinux/disable can be used
|
| 1610 |
|
|
later to disable prior to initial policy load.
|
| 1611 |
|
|
|
| 1612 |
|
|
selinux_compat_net =
|
| 1613 |
|
|
[SELINUX] Set initial selinux_compat_net flag value.
|
| 1614 |
|
|
Format: { "0" | "1" }
|
| 1615 |
|
|
|
| 1616 |
|
|
1 -- use legacy packet controls
|
| 1617 |
|
|
Default value is 0 (preferred).
|
| 1618 |
|
|
Value can be changed at runtime via
|
| 1619 |
|
|
/selinux/compat_net.
|
| 1620 |
|
|
|
| 1621 |
|
|
serialnumber [BUGS=X86-32]
|
| 1622 |
|
|
|
| 1623 |
|
|
shapers= [NET]
|
| 1624 |
|
|
Maximal number of shapers.
|
| 1625 |
|
|
|
| 1626 |
|
|
sim710= [SCSI,HW]
|
| 1627 |
|
|
See header of drivers/scsi/sim710.c.
|
| 1628 |
|
|
|
| 1629 |
|
|
simeth= [IA-64]
|
| 1630 |
|
|
simscsi=
|
| 1631 |
|
|
|
| 1632 |
|
|
slram= [HW,MTD]
|
| 1633 |
|
|
|
| 1634 |
|
|
slub_debug[=options[,slabs]] [MM, SLUB]
|
| 1635 |
|
|
Enabling slub_debug allows one to determine the
|
| 1636 |
|
|
culprit if slab objects become corrupted. Enabling
|
| 1637 |
|
|
slub_debug can create guard zones around objects and
|
| 1638 |
|
|
may poison objects when not in use. Also tracks the
|
| 1639 |
|
|
last alloc / free. For more information see
|
| 1640 |
|
|
Documentation/vm/slub.txt.
|
| 1641 |
|
|
|
| 1642 |
|
|
slub_max_order= [MM, SLUB]
|
| 1643 |
|
|
Determines the maximum allowed order for slabs.
|
| 1644 |
|
|
A high setting may cause OOMs due to memory
|
| 1645 |
|
|
fragmentation. For more information see
|
| 1646 |
|
|
Documentation/vm/slub.txt.
|
| 1647 |
|
|
|
| 1648 |
|
|
slub_min_objects= [MM, SLUB]
|
| 1649 |
|
|
The minimum number of objects per slab. SLUB will
|
| 1650 |
|
|
increase the slab order up to slub_max_order to
|
| 1651 |
|
|
generate a sufficiently large slab able to contain
|
| 1652 |
|
|
the number of objects indicated. The higher the number
|
| 1653 |
|
|
of objects the smaller the overhead of tracking slabs
|
| 1654 |
|
|
and the less frequently locks need to be acquired.
|
| 1655 |
|
|
For more information see Documentation/vm/slub.txt.
|
| 1656 |
|
|
|
| 1657 |
|
|
slub_min_order= [MM, SLUB]
|
| 1658 |
|
|
Determines the mininum page order for slabs. Must be
|
| 1659 |
|
|
lower than slub_max_order.
|
| 1660 |
|
|
For more information see Documentation/vm/slub.txt.
|
| 1661 |
|
|
|
| 1662 |
|
|
slub_nomerge [MM, SLUB]
|
| 1663 |
|
|
Disable merging of slabs with similar size. May be
|
| 1664 |
|
|
necessary if there is some reason to distinguish
|
| 1665 |
|
|
allocs to different slabs. Debug options disable
|
| 1666 |
|
|
merging on their own.
|
| 1667 |
|
|
For more information see Documentation/vm/slub.txt.
|
| 1668 |
|
|
|
| 1669 |
|
|
smart2= [HW]
|
| 1670 |
|
|
Format: [,[,...,]]
|
| 1671 |
|
|
|
| 1672 |
|
|
smp-alt-once [X86-32,SMP] On a hotplug CPU system, only
|
| 1673 |
|
|
attempt to substitute SMP alternatives once at boot.
|
| 1674 |
|
|
|
| 1675 |
|
|
smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
|
| 1676 |
|
|
smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
|
| 1677 |
|
|
smsc-ircc2.ircc_sir= [HW] SIR base I/O port
|
| 1678 |
|
|
smsc-ircc2.ircc_fir= [HW] FIR base I/O port
|
| 1679 |
|
|
smsc-ircc2.ircc_irq= [HW] IRQ line
|
| 1680 |
|
|
smsc-ircc2.ircc_dma= [HW] DMA channel
|
| 1681 |
|
|
smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
|
| 1682 |
|
|
0: Toshiba Satellite 1800 (GP data pin select)
|
| 1683 |
|
|
1: Fast pin select (default)
|
| 1684 |
|
|
2: ATC IRMode
|
| 1685 |
|
|
|
| 1686 |
|
|
snd-ad1816a= [HW,ALSA]
|
| 1687 |
|
|
|
| 1688 |
|
|
snd-ad1848= [HW,ALSA]
|
| 1689 |
|
|
|
| 1690 |
|
|
snd-ali5451= [HW,ALSA]
|
| 1691 |
|
|
|
| 1692 |
|
|
snd-als100= [HW,ALSA]
|
| 1693 |
|
|
|
| 1694 |
|
|
snd-als4000= [HW,ALSA]
|
| 1695 |
|
|
|
| 1696 |
|
|
snd-azt2320= [HW,ALSA]
|
| 1697 |
|
|
|
| 1698 |
|
|
snd-cmi8330= [HW,ALSA]
|
| 1699 |
|
|
|
| 1700 |
|
|
snd-cmipci= [HW,ALSA]
|
| 1701 |
|
|
|
| 1702 |
|
|
snd-cs4231= [HW,ALSA]
|
| 1703 |
|
|
|
| 1704 |
|
|
snd-cs4232= [HW,ALSA]
|
| 1705 |
|
|
|
| 1706 |
|
|
snd-cs4236= [HW,ALSA]
|
| 1707 |
|
|
|
| 1708 |
|
|
snd-cs4281= [HW,ALSA]
|
| 1709 |
|
|
|
| 1710 |
|
|
snd-cs46xx= [HW,ALSA]
|
| 1711 |
|
|
|
| 1712 |
|
|
snd-dt019x= [HW,ALSA]
|
| 1713 |
|
|
|
| 1714 |
|
|
snd-dummy= [HW,ALSA]
|
| 1715 |
|
|
|
| 1716 |
|
|
snd-emu10k1= [HW,ALSA]
|
| 1717 |
|
|
|
| 1718 |
|
|
snd-ens1370= [HW,ALSA]
|
| 1719 |
|
|
|
| 1720 |
|
|
snd-ens1371= [HW,ALSA]
|
| 1721 |
|
|
|
| 1722 |
|
|
snd-es968= [HW,ALSA]
|
| 1723 |
|
|
|
| 1724 |
|
|
snd-es1688= [HW,ALSA]
|
| 1725 |
|
|
|
| 1726 |
|
|
snd-es18xx= [HW,ALSA]
|
| 1727 |
|
|
|
| 1728 |
|
|
snd-es1938= [HW,ALSA]
|
| 1729 |
|
|
|
| 1730 |
|
|
snd-es1968= [HW,ALSA]
|
| 1731 |
|
|
|
| 1732 |
|
|
snd-fm801= [HW,ALSA]
|
| 1733 |
|
|
|
| 1734 |
|
|
snd-gusclassic= [HW,ALSA]
|
| 1735 |
|
|
|
| 1736 |
|
|
snd-gusextreme= [HW,ALSA]
|
| 1737 |
|
|
|
| 1738 |
|
|
snd-gusmax= [HW,ALSA]
|
| 1739 |
|
|
|
| 1740 |
|
|
snd-hdsp= [HW,ALSA]
|
| 1741 |
|
|
|
| 1742 |
|
|
snd-ice1712= [HW,ALSA]
|
| 1743 |
|
|
|
| 1744 |
|
|
snd-intel8x0= [HW,ALSA]
|
| 1745 |
|
|
|
| 1746 |
|
|
snd-interwave= [HW,ALSA]
|
| 1747 |
|
|
|
| 1748 |
|
|
snd-interwave-stb=
|
| 1749 |
|
|
[HW,ALSA]
|
| 1750 |
|
|
|
| 1751 |
|
|
snd-korg1212= [HW,ALSA]
|
| 1752 |
|
|
|
| 1753 |
|
|
snd-maestro3= [HW,ALSA]
|
| 1754 |
|
|
|
| 1755 |
|
|
snd-mpu401= [HW,ALSA]
|
| 1756 |
|
|
|
| 1757 |
|
|
snd-mtpav= [HW,ALSA]
|
| 1758 |
|
|
|
| 1759 |
|
|
snd-nm256= [HW,ALSA]
|
| 1760 |
|
|
|
| 1761 |
|
|
snd-opl3sa2= [HW,ALSA]
|
| 1762 |
|
|
|
| 1763 |
|
|
snd-opti92x-ad1848=
|
| 1764 |
|
|
[HW,ALSA]
|
| 1765 |
|
|
|
| 1766 |
|
|
snd-opti92x-cs4231=
|
| 1767 |
|
|
[HW,ALSA]
|
| 1768 |
|
|
|
| 1769 |
|
|
snd-opti93x= [HW,ALSA]
|
| 1770 |
|
|
|
| 1771 |
|
|
snd-pmac= [HW,ALSA]
|
| 1772 |
|
|
|
| 1773 |
|
|
snd-rme32= [HW,ALSA]
|
| 1774 |
|
|
|
| 1775 |
|
|
snd-rme96= [HW,ALSA]
|
| 1776 |
|
|
|
| 1777 |
|
|
snd-rme9652= [HW,ALSA]
|
| 1778 |
|
|
|
| 1779 |
|
|
snd-sb8= [HW,ALSA]
|
| 1780 |
|
|
|
| 1781 |
|
|
snd-sb16= [HW,ALSA]
|
| 1782 |
|
|
|
| 1783 |
|
|
snd-sbawe= [HW,ALSA]
|
| 1784 |
|
|
|
| 1785 |
|
|
snd-serial= [HW,ALSA]
|
| 1786 |
|
|
|
| 1787 |
|
|
snd-sgalaxy= [HW,ALSA]
|
| 1788 |
|
|
|
| 1789 |
|
|
snd-sonicvibes= [HW,ALSA]
|
| 1790 |
|
|
|
| 1791 |
|
|
snd-sun-amd7930=
|
| 1792 |
|
|
[HW,ALSA]
|
| 1793 |
|
|
|
| 1794 |
|
|
snd-sun-cs4231= [HW,ALSA]
|
| 1795 |
|
|
|
| 1796 |
|
|
snd-trident= [HW,ALSA]
|
| 1797 |
|
|
|
| 1798 |
|
|
snd-usb-audio= [HW,ALSA,USB]
|
| 1799 |
|
|
|
| 1800 |
|
|
snd-via82xx= [HW,ALSA]
|
| 1801 |
|
|
|
| 1802 |
|
|
snd-virmidi= [HW,ALSA]
|
| 1803 |
|
|
|
| 1804 |
|
|
snd-wavefront= [HW,ALSA]
|
| 1805 |
|
|
|
| 1806 |
|
|
snd-ymfpci= [HW,ALSA]
|
| 1807 |
|
|
|
| 1808 |
|
|
sonypi.*= [HW] Sony Programmable I/O Control Device driver
|
| 1809 |
|
|
See Documentation/sonypi.txt
|
| 1810 |
|
|
|
| 1811 |
|
|
specialix= [HW,SERIAL] Specialix multi-serial port adapter
|
| 1812 |
|
|
See Documentation/specialix.txt.
|
| 1813 |
|
|
|
| 1814 |
|
|
spia_io_base= [HW,MTD]
|
| 1815 |
|
|
spia_fio_base=
|
| 1816 |
|
|
spia_pedr=
|
| 1817 |
|
|
spia_peddr=
|
| 1818 |
|
|
|
| 1819 |
|
|
sscape= [HW,OSS]
|
| 1820 |
|
|
Format: ,,,,
|
| 1821 |
|
|
|
| 1822 |
|
|
st= [HW,SCSI] SCSI tape parameters (buffers, etc.)
|
| 1823 |
|
|
See Documentation/scsi/st.txt.
|
| 1824 |
|
|
|
| 1825 |
|
|
st0x= [HW,SCSI]
|
| 1826 |
|
|
See header of drivers/scsi/seagate.c.
|
| 1827 |
|
|
|
| 1828 |
|
|
sti= [PARISC,HW]
|
| 1829 |
|
|
Format:
|
| 1830 |
|
|
Set the STI (builtin display/keyboard on the HP-PARISC
|
| 1831 |
|
|
machines) console (graphic card) which should be used
|
| 1832 |
|
|
as the initial boot-console.
|
| 1833 |
|
|
See also comment in drivers/video/console/sticore.c.
|
| 1834 |
|
|
|
| 1835 |
|
|
sti_font= [HW]
|
| 1836 |
|
|
See comment in drivers/video/console/sticore.c.
|
| 1837 |
|
|
|
| 1838 |
|
|
stifb= [HW]
|
| 1839 |
|
|
Format: bpp:[:[:...]]
|
| 1840 |
|
|
|
| 1841 |
|
|
sunrpc.pool_mode=
|
| 1842 |
|
|
[NFS]
|
| 1843 |
|
|
Control how the NFS server code allocates CPUs to
|
| 1844 |
|
|
service thread pools. Depending on how many NICs
|
| 1845 |
|
|
you have and where their interrupts are bound, this
|
| 1846 |
|
|
option will affect which CPUs will do NFS serving.
|
| 1847 |
|
|
Note: this parameter cannot be changed while the
|
| 1848 |
|
|
NFS server is running.
|
| 1849 |
|
|
|
| 1850 |
|
|
auto the server chooses an appropriate mode
|
| 1851 |
|
|
automatically using heuristics
|
| 1852 |
|
|
global a single global pool contains all CPUs
|
| 1853 |
|
|
percpu one pool for each CPU
|
| 1854 |
|
|
pernode one pool for each NUMA node (equivalent
|
| 1855 |
|
|
to global on non-NUMA machines)
|
| 1856 |
|
|
|
| 1857 |
|
|
swiotlb= [IA-64] Number of I/O TLB slabs
|
| 1858 |
|
|
|
| 1859 |
|
|
switches= [HW,M68k]
|
| 1860 |
|
|
|
| 1861 |
|
|
sym53c416= [HW,SCSI]
|
| 1862 |
|
|
See header of drivers/scsi/sym53c416.c.
|
| 1863 |
|
|
|
| 1864 |
|
|
sysrq_always_enabled
|
| 1865 |
|
|
[KNL]
|
| 1866 |
|
|
Ignore sysrq setting - this boot parameter will
|
| 1867 |
|
|
neutralize any effect of /proc/sys/kernel/sysrq.
|
| 1868 |
|
|
Useful for debugging.
|
| 1869 |
|
|
|
| 1870 |
|
|
t128= [HW,SCSI]
|
| 1871 |
|
|
See header of drivers/scsi/t128.c.
|
| 1872 |
|
|
|
| 1873 |
|
|
tdfx= [HW,DRM]
|
| 1874 |
|
|
|
| 1875 |
|
|
thash_entries= [KNL,NET]
|
| 1876 |
|
|
Set number of hash buckets for TCP connection
|
| 1877 |
|
|
|
| 1878 |
|
|
thermal.act= [HW,ACPI]
|
| 1879 |
|
|
-1: disable all active trip points in all thermal zones
|
| 1880 |
|
|
: override all lowest active trip points
|
| 1881 |
|
|
|
| 1882 |
|
|
thermal.crt= [HW,ACPI]
|
| 1883 |
|
|
-1: disable all critical trip points in all thermal zones
|
| 1884 |
|
|
: lower all critical trip points
|
| 1885 |
|
|
|
| 1886 |
|
|
thermal.nocrt= [HW,ACPI]
|
| 1887 |
|
|
Set to disable actions on ACPI thermal zone
|
| 1888 |
|
|
critical and hot trip points.
|
| 1889 |
|
|
|
| 1890 |
|
|
thermal.off= [HW,ACPI]
|
| 1891 |
|
|
1: disable ACPI thermal control
|
| 1892 |
|
|
|
| 1893 |
|
|
thermal.psv= [HW,ACPI]
|
| 1894 |
|
|
-1: disable all passive trip points
|
| 1895 |
|
|
: override all passive trip points to this value
|
| 1896 |
|
|
|
| 1897 |
|
|
thermal.tzp= [HW,ACPI]
|
| 1898 |
|
|
Specify global default ACPI thermal zone polling rate
|
| 1899 |
|
|
: poll all this frequency
|
| 1900 |
|
|
0: no polling (default)
|
| 1901 |
|
|
|
| 1902 |
|
|
time Show timing data prefixed to each printk message line
|
| 1903 |
|
|
[deprecated, see 'printk.time']
|
| 1904 |
|
|
|
| 1905 |
|
|
tipar.timeout= [HW,PPT]
|
| 1906 |
|
|
Set communications timeout in tenths of a second
|
| 1907 |
|
|
(default 15).
|
| 1908 |
|
|
|
| 1909 |
|
|
tipar.delay= [HW,PPT]
|
| 1910 |
|
|
Set inter-bit delay in microseconds (default 10).
|
| 1911 |
|
|
|
| 1912 |
|
|
tmc8xx= [HW,SCSI]
|
| 1913 |
|
|
See header of drivers/scsi/seagate.c.
|
| 1914 |
|
|
|
| 1915 |
|
|
tmscsim= [HW,SCSI]
|
| 1916 |
|
|
See comment before function dc390_setup() in
|
| 1917 |
|
|
drivers/scsi/tmscsim.c.
|
| 1918 |
|
|
|
| 1919 |
|
|
tp720= [HW,PS2]
|
| 1920 |
|
|
|
| 1921 |
|
|
trix= [HW,OSS] MediaTrix AudioTrix Pro
|
| 1922 |
|
|
Format:
|
| 1923 |
|
|
,,,,,,,,
|
| 1924 |
|
|
|
| 1925 |
|
|
turbografx.map[2|3]= [HW,JOY]
|
| 1926 |
|
|
TurboGraFX parallel port interface
|
| 1927 |
|
|
Format:
|
| 1928 |
|
|
,,,,,,,
|
| 1929 |
|
|
See also Documentation/input/joystick-parport.txt
|
| 1930 |
|
|
|
| 1931 |
|
|
u14-34f= [HW,SCSI] UltraStor 14F/34F SCSI host adapter
|
| 1932 |
|
|
See header of drivers/scsi/u14-34f.c.
|
| 1933 |
|
|
|
| 1934 |
|
|
uart401= [HW,OSS]
|
| 1935 |
|
|
Format: ,
|
| 1936 |
|
|
|
| 1937 |
|
|
uart6850= [HW,OSS]
|
| 1938 |
|
|
Format: ,
|
| 1939 |
|
|
|
| 1940 |
|
|
uhci-hcd.ignore_oc=
|
| 1941 |
|
|
[USB] Ignore overcurrent events (default N).
|
| 1942 |
|
|
Some badly-designed motherboards generate lots of
|
| 1943 |
|
|
bogus events, for ports that aren't wired to
|
| 1944 |
|
|
anything. Set this parameter to avoid log spamming.
|
| 1945 |
|
|
Note that genuine overcurrent events won't be
|
| 1946 |
|
|
reported either.
|
| 1947 |
|
|
|
| 1948 |
|
|
usbcore.autosuspend=
|
| 1949 |
|
|
[USB] The autosuspend time delay (in seconds) used
|
| 1950 |
|
|
for newly-detected USB devices (default 2). This
|
| 1951 |
|
|
is the time required before an idle device will be
|
| 1952 |
|
|
autosuspended. Devices for which the delay is set
|
| 1953 |
|
|
to a negative value won't be autosuspended at all.
|
| 1954 |
|
|
|
| 1955 |
|
|
usbhid.mousepoll=
|
| 1956 |
|
|
[USBHID] The interval which mice are to be polled at.
|
| 1957 |
|
|
|
| 1958 |
|
|
vdso= [X86-32,SH,x86-64]
|
| 1959 |
|
|
vdso=2: enable compat VDSO (default with COMPAT_VDSO)
|
| 1960 |
|
|
vdso=1: enable VDSO (default)
|
| 1961 |
|
|
vdso=0: disable VDSO mapping
|
| 1962 |
|
|
|
| 1963 |
|
|
vector= [IA-64,SMP]
|
| 1964 |
|
|
vector=percpu: enable percpu vector domain
|
| 1965 |
|
|
|
| 1966 |
|
|
video= [FB] Frame buffer configuration
|
| 1967 |
|
|
See Documentation/fb/modedb.txt.
|
| 1968 |
|
|
|
| 1969 |
|
|
vga= [BOOT,X86-32] Select a particular video mode
|
| 1970 |
|
|
See Documentation/i386/boot.txt and
|
| 1971 |
|
|
Documentation/svga.txt.
|
| 1972 |
|
|
Use vga=ask for menu.
|
| 1973 |
|
|
This is actually a boot loader parameter; the value is
|
| 1974 |
|
|
passed to the kernel using a special protocol.
|
| 1975 |
|
|
|
| 1976 |
|
|
vmalloc=nn[KMG] [KNL,BOOT] Forces the vmalloc area to have an exact
|
| 1977 |
|
|
size of . This can be used to increase the
|
| 1978 |
|
|
minimum size (128MB on x86). It can also be used to
|
| 1979 |
|
|
decrease the size and leave more room for directly
|
| 1980 |
|
|
mapped kernel RAM.
|
| 1981 |
|
|
|
| 1982 |
|
|
vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
|
| 1983 |
|
|
Format:
|
| 1984 |
|
|
|
| 1985 |
|
|
vmpanic= [KNL,S390] Perform z/VM CP command after kernel panic.
|
| 1986 |
|
|
Format:
|
| 1987 |
|
|
|
| 1988 |
|
|
vmpoff= [KNL,S390] Perform z/VM CP command after power off.
|
| 1989 |
|
|
Format:
|
| 1990 |
|
|
|
| 1991 |
|
|
waveartist= [HW,OSS]
|
| 1992 |
|
|
Format: ,,,
|
| 1993 |
|
|
|
| 1994 |
|
|
wd33c93= [HW,SCSI]
|
| 1995 |
|
|
See header of drivers/scsi/wd33c93.c.
|
| 1996 |
|
|
|
| 1997 |
|
|
wd7000= [HW,SCSI]
|
| 1998 |
|
|
See header of drivers/scsi/wd7000.c.
|
| 1999 |
|
|
|
| 2000 |
|
|
wdt= [WDT] Watchdog
|
| 2001 |
|
|
See Documentation/watchdog/wdt.txt.
|
| 2002 |
|
|
|
| 2003 |
|
|
xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks.
|
| 2004 |
|
|
xd_geo= See header of drivers/block/xd.c.
|
| 2005 |
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|
|
| 2006 |
|
|
xirc2ps_cs= [NET,PCMCIA]
|
| 2007 |
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|
Format:
|
| 2008 |
|
|
,,,,,[,[,[,]]]
|
| 2009 |
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|
|
| 2010 |
|
|
norandmaps Don't use address space randomization
|
| 2011 |
|
|
Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
|
| 2012 |
|
|
|
| 2013 |
|
|
______________________________________________________________________
|
| 2014 |
|
|
|
| 2015 |
|
|
TODO:
|
| 2016 |
|
|
|
| 2017 |
|
|
Add documentation for ALSA options.
|
| 2018 |
|
|
Add more DRM drivers.
|
