This is a note to let you know that I've just added the patch titled
mm/memory-failure: fix an incorrect use of tail pages
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-memory-failure-fix-an-incorrect-use-of-tail-pages.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From liushixin2@xxxxxxxxxx Sat Mar 30 10:11:48 2024
From: Liu Shixin <liushixin2@xxxxxxxxxx>
Date: Thu, 7 Mar 2024 20:51:50 +0800
Subject: mm/memory-failure: fix an incorrect use of tail pages
To: Matthew Wilcox <willy@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Sasha Levin <sashal@xxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: <linux-kernel@xxxxxxxxxxxxxxx>, <linux-mm@xxxxxxxxx>, <stable@xxxxxxxxxxxxxxx>, Liu Shixin <liushixin2@xxxxxxxxxx>
Message-ID: <20240307125150.2849068-1-liushixin2@xxxxxxxxxx>
From: Liu Shixin <liushixin2@xxxxxxxxxx>
When backport commit c79c5a0a00a9 to 4.19-stable, there is a mistake change.
The head page instead of tail page should be passed to try_to_unmap(),
otherwise unmap will failed as follows.
Memory failure: 0x121c10: failed to unmap page (mapcount=1)
Memory failure: 0x121c10: recovery action for unmapping failed page: Ignored
Fixes: c6f50413f2aa ("mm/memory-failure: check the mapcount of the precise page")
Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1033,7 +1033,7 @@ static bool hwpoison_user_mappings(struc
if (kill)
collect_procs(hpage, &tokill, flags & MF_ACTION_REQUIRED);
- unmap_success = try_to_unmap(p, ttu);
+ unmap_success = try_to_unmap(hpage, ttu);
if (!unmap_success)
pr_err("Memory failure: %#lx: failed to unmap page (mapcount=%d)\n",
pfn, page_mapcount(p));
Patches currently in stable-queue which might be from liushixin2@xxxxxxxxxx are
queue-4.19/mm-memory-failure-fix-an-incorrect-use-of-tail-pages.patch
