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| author | Yang Yang <yang.yang29@zte.com.cn> | 2022-01-19 18:10:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-20 08:52:55 +0200 |
| commit | a3d5dc908a5f572ce3e31fe83fd2459a1c3c5422 (patch) | |
| tree | 4aa83c6a0edc2f7cfee7707ac32ae8f1e36c2659 /include/asm-generic/dma-mapping.h | |
| parent | e83a4472bf9f556d01984048e398e64246c4dd6f (diff) | |
| download | linux-a3d5dc908a5f572ce3e31fe83fd2459a1c3c5422.tar.bz2 | |
delayacct: support swapin delay accounting for swapping without blkio
Currently delayacct accounts swapin delay only for swapping that cause
blkio. If we use zram for swapping, tools/accounting/getdelays can't
get any SWAP delay.
It's useful to get zram swapin delay information, for example to adjust
compress algorithm or /proc/sys/vm/swappiness.
Reference to PSI, it accounts any kind of swapping by doing its work in
swap_readpage(), no matter whether swapping causes blkio. Let delayacct
do the similar work.
Link: https://lkml.kernel.org/r/20211112083813.8559-1-yang.yang29@zte.com.cn
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Reported-by: Zeal Robot <zealci@zte.com.cn>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic/dma-mapping.h')
0 files changed, 0 insertions, 0 deletions