The patch titled
Subject: page_io: zswap: do not crash the kernel on decompression failure (fix)
has been added to the -mm mm-unstable branch. Its filename is
page_io-zswap-do-not-crash-the-kernel-on-decompression-failure-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/page_io-zswap-do-not-crash-the-kernel-on-decompression-failure-fix.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: Nhat Pham <nphamcs@xxxxxxxxx>
Subject: page_io: zswap: do not crash the kernel on decompression failure (fix)
Date: Thu, 6 Mar 2025 14:24:53 -0800
Fix the documentation of zswap_load() - should say load a folio (rather
than a page), and should be explicit that the folio is unlocked and marked
up-to-date in the success case.
Link: https://lkml.kernel.org/r/20250306222453.1269456-1-nphamcs@xxxxxxxxx
Signed-off-by: Nhat Pham <nphamcs@xxxxxxxxx>
Suggested-by: Yosry Ahmed <yosry.ahmed@xxxxxxxxx>
Cc: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zswap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/zswap.c~page_io-zswap-do-not-crash-the-kernel-on-decompression-failure-fix
+++ a/mm/zswap.c
@@ -1629,10 +1629,11 @@ check_old:
}
/**
- * zswap_load() - load a page from zswap
+ * zswap_load() - load a folio from zswap
* @folio: folio to load
*
- * Return: 0 on success, or one of the following error codes:
+ * Return: 0 on success, with the folio unlocked and marked up-to-date, or one
+ * of the following error codes:
*
* -EIO: if the swapped out content was in zswap, but could not be loaded
* into the page due to a decompression failure. The folio is unlocked, but
_
Patches currently in -mm which might be from nphamcs@xxxxxxxxx are
page_io-zswap-do-not-crash-the-kernel-on-decompression-failure.patch
page_io-zswap-do-not-crash-the-kernel-on-decompression-failure-fix.patch
