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authorChengming Zhou <zhouchengming@bytedance.com>2024-02-04 06:06:01 +0300
committerAndrew Morton <akpm@linux-foundation.org>2024-02-22 21:24:54 +0300
commitb49547ade38a63ff39c9fbc53fb38622cb63854a (patch)
treedda6b34e05378084c6d75a45245d48b21ad8fc50 /mm/list_lru.c
parent0827a1fb143fae588cb6f5b9a97c405d6c2ddec9 (diff)
downloadlinux-b49547ade38a63ff39c9fbc53fb38622cb63854a.tar.xz
mm/zswap: stop lru list shrinking when encounter warm region
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>
Diffstat (limited to 'mm/list_lru.c')
-rw-r--r--mm/list_lru.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c
index 61f3b6b1134f..3fd64736bc45 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -243,6 +243,9 @@ restart:
*/
assert_spin_locked(&nlru->lock);
goto restart;
+ case LRU_STOP:
+ assert_spin_locked(&nlru->lock);
+ goto out;
default:
BUG();
}