The patch titled
Subject: mm/hwpoison: add in-use hugepage hwpoison filter judgement
has been added to the -mm tree. Its filename is
mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement.patch
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------------------------------------------------------
From: luofei <luofei@xxxxxxxxxxxx>
Subject: mm/hwpoison: add in-use hugepage hwpoison filter judgement
After successfully obtaining the reference count of the huge page, it is
still necessary to call hwpoison_filter() to make a filter judgement,
otherwise the filter hugepage will be unmaped and the related process may
be killed.
Link: https://lkml.kernel.org/r/20220223082254.2769757-1-luofei@xxxxxxxxxxxx
Signed-off-by: luofei <luofei@xxxxxxxxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/mm/memory-failure.c~mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement
+++ a/mm/memory-failure.c
@@ -1534,6 +1534,14 @@ static int memory_failure_hugetlb(unsign
lock_page(head);
page_flags = head->flags;
+ if (hwpoison_filter(p)) {
+ if (TestClearPageHWPoison(head))
+ num_poisoned_pages_dec();
+ put_page(p);
+ res = -EOPNOTSUPP;
+ goto out;
+ }
+
/*
* TODO: hwpoison for pud-sized hugetlb doesn't work right now, so
* simply disable it. In order to make it work properly, we need
_
Patches currently in -mm which might be from luofei@xxxxxxxxxxxx are
mm-hwpoison-avoid-the-impact-of-hwpoison_filter-return-value-on-mce-handler.patch
mm-hwpoison-add-in-use-hugepage-hwpoison-filter-judgement.patch
