diff options
author | Yang Yang <yang.yang29@zte.com.cn> | 2022-08-15 07:28:37 +0000 |
---|---|---|
committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:08 -0700 |
commit | 3a9bb7b1879bef057a5dbff1dac1fa1411638064 (patch) | |
tree | 28c2876a44ea4f02422dc0f9ce709b4296ab3cb4 /arch | |
parent | aa1cf99b87e934e761b46ce2b925335a398980da (diff) | |
download | linux-3a9bb7b1879bef057a5dbff1dac1fa1411638064.tar.gz |
mm/page_io: count submission time as thrashing delay for delayacct
Once upon a time, we only support accounting thrashing of page cache.
Then Joonsoo introduced workingset detection for anonymous pages and we
gained the ability to account thrashing of them[1].
Likes PSI, we count submission time as thrashing delay because when the
device is congested, or the submitting cgroup IO-throttled, submission can
be a significant part of overall IO time.
Without this patch, swap thrashing through frontswap or some block
device supporting rw_page operation isn't measured correctly.
This patch is based on "delayacct: support re-entrance detection of
thrashing accounting".
[1] commit aae466b0052e ("mm/swap: implement workingset detection for anonymous LRU")
Link: https://lkml.kernel.org/r/20220815072835.74876-1-yang.yang29@zte.com.cn
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Reviewed-by: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Reviewed-by: wangyong <wang.yong12@zte.com.cn>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions