mm/zswap: stop lru list shrinking when encounter warm region

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When the shrinker encounter an existing folio in swap cache, it means we
are shrinking into the warmer region.  We should terminate shrinking if
we're in the dynamic shrinker context.

This patch add LRU_STOP to support this, to avoid overshrinking.

Link: https://lkml.kernel.org/r/20240201-b4-zswap-invalidate-entry-v2-3-99d4084260a0@bytedance.com
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Nhat Pham <nphamcs@gmail.com>
Reviewed-by: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Chengming Zhou 2024-02-04 03:06:01 +00:00 • committed by Andrew Morton

parent 0827a1fb14

commit b49547ade3

3 changed files with 8 additions and 1 deletions

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2

include/linux/list_lru.h

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3

mm/list_lru.c

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4

mm/zswap.c

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