mm/mmzone.c: use try_cmpxchg() in page_cpupid_xchg_last()

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This will let us avoid an additional read from page->flags when retrying
the compare-exchange on some architectures.

Link: https://lkml.kernel.org/r/20220120011200.1322836-1-pcc@google.com
Link: https://linux-review.googlesource.com/id/I2e1f5b5b080ac9c4e0eb7f98768dba6fd7821693
Signed-off-by: Peter Collingbourne <pcc@google.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

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Peter Collingbourne 2022-03-22 14:43:08 -07:00 • committed by Linus Torvalds

parent 1dd214b8f2

commit abe8b2ae64

1 changed files with 4 additions and 3 deletions

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mm/mmzone.c

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