blob: 165390f8b93672e8b79a2fe9a40eb21f74ab1b5e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* proc_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_XACCT
struct task_chr_io_accounting {
/* bytes read */
u64 rchar;
/* bytes written */
u64 wchar;
/* # of read syscalls */
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.
*/
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 /* 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;
};
|
