ad4b32c45d
This adds a counter to the taskstats extended accounting fields, which
tracks the number of times fsync is called, and then plumbs it through
to the uid_sys_stats driver.
Bug: 120442023
Change-Id: I6c138de5b2332eea70f57e098134d1d141247b3f
Signed-off-by: Jin Qian <jinqian@google.com>
[AmitP: Refactored changes to align with changes from upstream commit
9a07000400 ("sched/headers: Move CONFIG_TASK_XACCT bits from <linux/sched.h> to <linux/sched/xacct.h>")]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
[tkjos: Needed for storaged fsync accounting ("storaged --uid" and
"storaged --task").]
[astrachan: This is modifying a userspace interface and should probably
be reworked]
Signed-off-by: Alistair Strachan <astrachan@google.com>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* task_io_accounting: a structure which is used for recording a single task's
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* IO statistics.
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*
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* Don't include this header file directly - it is designed to be dragged in via
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* sched.h.
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*
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* Blame Andrew Morton for all this.
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*/
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struct task_io_accounting {
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#ifdef CONFIG_TASK_XACCT
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/* bytes read */
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u64 rchar;
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/* bytes written */
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u64 wchar;
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/* # of read syscalls */
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u64 syscr;
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/* # of write syscalls */
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u64 syscw;
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/* # of fsync syscalls */
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u64 syscfs;
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#endif /* CONFIG_TASK_XACCT */
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#ifdef CONFIG_TASK_IO_ACCOUNTING
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/*
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* The number of bytes which this task has caused to be read from
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* storage.
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*/
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u64 read_bytes;
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/*
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* The number of bytes which this task has caused, or shall cause to be
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* written to disk.
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*/
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u64 write_bytes;
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/*
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* A task can cause "negative" IO too. If this task truncates some
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* dirty pagecache, some IO which another task has been accounted for
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* (in its write_bytes) will not be happening. We _could_ just
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* subtract that from the truncating task's write_bytes, but there is
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* information loss in doing that.
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*/
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u64 cancelled_write_bytes;
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#endif /* CONFIG_TASK_IO_ACCOUNTING */
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};
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