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task IO accounting: move all IO statistics in struct task_io_accounting

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Simplify the code of include/linux/task_io_accounting.h.

It is also more reasonable to have all the task i/o-related statistics in a
single struct (task_io_accounting).

Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Righi 2008-07-28 00:48:12 +02:00 • committed by Linus Torvalds
parent 837b41b5de
commit 940389b8af
5 changed files with 44 additions and 57 deletions
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17
include/linux/task_io_accounting.h
View file

@ -1,5 +1,5 @@
/*
* proc_io_accounting: a structure which is used for recording a single task's
* 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
@ -8,8 +8,8 @@
* Blame akpm@osdl.org for all this.
*/
struct task_io_accounting {
#ifdef CONFIG_TASK_XACCT
struct task_chr_io_accounting {
/* bytes read */
u64 rchar;
/* bytes written */
@ -18,14 +18,9 @@ struct task_chr_io_accounting {
u64 syscr;
/* # of write syscalls */
u64 syscw;
};
#else /* CONFIG_TASK_XACCT */
struct task_chr_io_accounting {
};
#endif /* CONFIG_TASK_XACCT */
#ifdef CONFIG_TASK_IO_ACCOUNTING
struct task_io_accounting {
/*
* The number of bytes which this task has caused to be read from
* storage.
@ -46,13 +41,5 @@ struct task_io_accounting {
* information loss in doing that.
*/
u64 cancelled_write_bytes;
};
#else /* CONFIG_TASK_IO_ACCOUNTING */
struct task_io_accounting {
};
#endif /* CONFIG_TASK_IO_ACCOUNTING */
struct proc_io_accounting {
struct task_chr_io_accounting chr;
struct task_io_accounting blk;
};