The patch titled
Subject: mm/swap_state: update zswap LRU's protection range with the folio locked
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked-v2.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked-v2.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Nhat Pham <nphamcs@xxxxxxxxx>
Subject: mm/swap_state: update zswap LRU's protection range with the folio locked
Date: Tue, 6 Feb 2024 10:08:55 -0800
add VM_WARN_ON_ONCE() to zswap_folio_swapin()
Link: https://lkml.kernel.org/r/20240206180855.3987204-1-nphamcs@xxxxxxxxx
Reported-by: syzbot+17a611d10af7d18a7092@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://lore.kernel.org/all/000000000000ae47f90610803260@xxxxxxxxxx/
Fixes: b5ba474f3f51 ("zswap: shrink zswap pool based on memory pressure")
Signed-off-by: Nhat Pham <nphamcs@xxxxxxxxx>
Cc: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zswap.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/zswap.c~mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked-v2
+++ a/mm/zswap.c
@@ -378,6 +378,7 @@ void zswap_folio_swapin(struct folio *fo
struct lruvec *lruvec;
if (folio) {
+ VM_WARN_ON_ONCE(!folio_test_locked(folio));
lruvec = folio_lruvec(folio);
atomic_long_inc(&lruvec->zswap_lruvec_state.nr_zswap_protected);
}
_
Patches currently in -mm which might be from nphamcs@xxxxxxxxx are
mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked.patch
mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked-v2.patch
mm-swap_state-update-zswap-lrus-protection-range-with-the-folio-locked-fix.patch
selftests-zswap-add-zswap-selftest-file-to-zswap-maintainer-entry.patch
selftests-fix-the-zswap-invasive-shrink-test.patch
selftests-add-zswapin-and-no-zswap-tests.patch
