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f2fs: add tracepoint for f2fs iostat

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Added a tracepoint to see iostat of f2fs. Default period of that
is 3 second. This tracepoint can be used to be monitoring
I/O statistics periodically.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong
2020-03-30 03:30:59 +00:00
committed by Jaegeuk Kim
parent da9953b729
commit 2bc4bea338
5 changed files with 113 additions and 1 deletions
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fs/f2fs/super.c
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@@ -3424,6 +3424,7 @@ try_onemore:
/* init iostat info */
spin_lock_init(&sbi->iostat_lock);
sbi->iostat_enable = false;
sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
for (i = 0; i < NR_PAGE_TYPE; i++) {
int n = (i == META) ? 1: NR_TEMP_TYPE;