The patch titled
Subject: mm/hwpoison: fix refcount of THP head page in no-injection case
has been added to the -mm tree. Its filename is
mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case.patch
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------------------------------------------------------
From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
Subject: mm/hwpoison: fix refcount of THP head page in no-injection case
Hwpoison injection takes a refcount of target page and another refcount of
head page of THP if the target page is the tail page of a THP. However,
current code doesn't release the refcount of head page if the THP is not
supported to be injected wrt hwpoison filter.
Fix it by reducing the refcount of head page if the target page is the
tail page of a THP and it is not supported to be injected.
Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hwpoison-inject.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/hwpoison-inject.c~mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case mm/hwpoison-inject.c
--- a/mm/hwpoison-inject.c~mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case
+++ a/mm/hwpoison-inject.c
@@ -58,7 +58,7 @@ inject:
pr_info("Injecting memory failure at pfn %#lx\n", pfn);
return memory_failure(pfn, 18, MF_COUNT_INCREASED);
put_out:
- put_page(p);
+ put_hwpoison_page(p);
return 0;
}
_
Patches currently in -mm which might be from wanpeng.li@xxxxxxxxxxx are
mm-hwpoison-fix-page-refcount-of-unkown-non-lru-page.patch
mm-hwpoison-fix-fail-isolate-hugetlbfs-page-w-refcount-held.patch
mm-hwpoison-fix-panic-due-to-split-huge-zero-page.patch
mm-hwpoison-fix-fail-to-split-thp-w-refcount-held.patch
mm-hwpoison-fix-pagehwpoison-test-set-race.patch
mm-hwpoison-introduce-put_hwpoison_page-to-put-refcount-for-memory-error-handling.patch
mm-hwpoison-introduce-put_hwpoison_page-to-put-refcount-for-memory-error-handling-fix.patch
mm-hwpoison-fix-refcount-of-thp-head-page-in-no-injection-case.patch
mm-hwpoison-replace-most-of-put_page-in-memory-error-handling-by-put_hwpoison_page.patch
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