/* SPDX-License-Identifier: GPL-2.0 */ /* * 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 Andrew Morton for all this.
*/
#ifdef CONFIG_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; #endif/* CONFIG_TASK_IO_ACCOUNTING */
};
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