The patch titled
Subject: hwpoison, hugetlbfs: fix "bad pmd" warning in unmapping hwpoisoned hugepage
has been removed from the -mm tree. Its filename was
hwpoison-hugetlbfs-fix-bad-pmd-warning-in-unmapping-hwpoisoned-hugepage.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: hwpoison, hugetlbfs: fix "bad pmd" warning in unmapping hwpoisoned hugepage
When a process which used a hwpoisoned hugepage tries to exit() or
munmap(), the kernel can print out "bad pmd" message because page table
walker in free_pgtables() encounters 'hwpoisoned entry' on pmd.
This is because currently we fail to clear the hwpoisoned entry in
__unmap_hugepage_range(), so this patch simply does it.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Andi Kleen <andi.kleen@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN mm/hugetlb.c~hwpoison-hugetlbfs-fix-bad-pmd-warning-in-unmapping-hwpoisoned-hugepage mm/hugetlb.c
--- a/mm/hugetlb.c~hwpoison-hugetlbfs-fix-bad-pmd-warning-in-unmapping-hwpoisoned-hugepage
+++ a/mm/hugetlb.c
@@ -2386,8 +2386,10 @@ again:
/*
* HWPoisoned hugepage is already unmapped and dropped reference
*/
- if (unlikely(is_hugetlb_entry_hwpoisoned(pte)))
+ if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) {
+ pte_clear(mm, address, ptep);
continue;
+ }
page = pte_page(pte);
/*
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
origin.patch
mm-print-out-information-of-file-affected-by-memory-error.patch
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