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delayacct: support re-entrance detection of thrashing accounting

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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].

For page cache thrashing accounting, there is no suitable place to do it
in fs level likes swap_readpage().  So we have to do it in
folio_wait_bit_common().

Then for anonymous pages thrashing accounting, we have to do it in both
swap_readpage() and folio_wait_bit_common().  This likes PSI, so we should
let thrashing accounting supports re-entrance detection.

This patch is to prepare complete thrashing accounting, and is based on
patch "filemap: make the accounting of thrashing more consistent".

[1] commit aae466b005 ("mm/swap: implement workingset detection for anonymous LRU")

Link: https://lkml.kernel.org/r/20220815071134.74551-1-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>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yang Yang
2022-08-15 07:11:35 +00:00
committed by Andrew Morton
parent 7047b5a40b
commit aa1cf99b87
4 changed files with 29 additions and 14 deletions
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13
kernel/delayacct.c
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@@ -214,13 +214,22 @@ void __delayacct_freepages_end(void)
&current->delays->freepages_count);
}
void __delayacct_thrashing_start(void)
void __delayacct_thrashing_start(bool *in_thrashing)
{
*in_thrashing = !!current->in_thrashing;
if (*in_thrashing)
return;
current->in_thrashing = 1;
current->delays->thrashing_start = local_clock();
}
void __delayacct_thrashing_end(void)
void __delayacct_thrashing_end(bool *in_thrashing)
{
if (*in_thrashing)
return;
current->in_thrashing = 0;
delayacct_end(&current->delays->lock,
&current->delays->thrashing_start,
&current->delays->thrashing_delay,