The patch titled
Subject: mm/zsmalloc: fix class per-fullness zspage counts
has been added to the -mm mm-unstable branch. Its filename is
mm-zsmalloc-fix-class-per-fullness-zspage-counts.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zsmalloc-fix-class-per-fullness-zspage-counts.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Subject: mm/zsmalloc: fix class per-fullness zspage counts
Date: Thu, 27 Jun 2024 15:59:58 +0800
We always use insert_zspage() and remove_zspage() to update zspage's
fullness location, which will account correctly.
But this special async free path use "splice" instead of remove_zspage(),
so the per-fullness zspage count for ZS_INUSE_RATIO_0 won't decrease.
Fix it by decreasing when iterate over the zspage free list.
Link: https://lkml.kernel.org/r/20240627075959.611783-1-chengming.zhou@xxxxxxxxx
Signed-off-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/zsmalloc.c~mm-zsmalloc-fix-class-per-fullness-zspage-counts
+++ a/mm/zsmalloc.c
@@ -1883,6 +1883,7 @@ static void async_free_zspage(struct wor
class = zspage_class(pool, zspage);
spin_lock(&class->lock);
+ class_stat_dec(class, ZS_INUSE_RATIO_0, 1);
__free_zspage(pool, class, zspage);
spin_unlock(&class->lock);
}
_
Patches currently in -mm which might be from chengming.zhou@xxxxxxxxx are
mm-zswap-use-only-one-pool-in-zswap.patch
mm-zswap-use-only-one-pool-in-zswap-v2.patch
mm-zswap-use-only-one-pool-in-zswap-v3.patch
mm-ksm-refactor-out-try_to_merge_with_zero_page.patch
mm-ksm-dont-waste-time-searching-stable-tree-for-fast-changing-page.patch
mm-ksm-optimize-the-chain-chain_prune-interfaces.patch
mm-zsmalloc-fix-class-per-fullness-zspage-counts.patch
mm-zsmalloc-move-record_obj-into-obj_malloc.patch
