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/*

 * task_io_accounting: a structure which is used for recording a single task's

 * IO statistics.

 *

 * Don't include this header file directly - it is designed to be dragged in via

 * sched.h.

 *

 * Blame akpm@osdl.org for all this.

 */

#ifdef CONFIG_TASK_IO_ACCOUNTING

struct task_io_accounting {

        /*

         * The number of bytes which this task has caused to be read from

         * storage.

         */

        u64 read_bytes;

        /*

         * The number of bytes which this task has caused, or shall cause to be

         * written to disk.

         */

        u64 write_bytes;

        /*

         * A task can cause "negative" IO too.  If this task truncates some

         * dirty pagecache, some IO which another task has been accounted for

         * (in its write_bytes) will not be happening.  We _could_ just

         * subtract that from the truncating task's write_bytes, but there is

         * information loss in doing that.

         */

        u64 cancelled_write_bytes;

};

#else

struct task_io_accounting {

};

#endif