You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37 lines
927 B
37 lines
927 B
/*
|
|
* 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
|
|
|