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mm/memory-failure: fix an incorrect use of tail pages 

When backport commit c79c5a0a00 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: c6f50413f2 ("mm/memory-failure: check the mapcount of the precise page")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liu Shixin 2024-03-07 20:51:50 +08:00 committed by Greg Kroah-Hartman
parent c8686c014b
commit 27f83f1cac
1 changed files with 1 additions and 1 deletions
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mm/memory-failure.c
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@ -1033,7 +1033,7 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
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));