diff options
| author | Naoya Horiguchi <[email protected]> | 2012-12-12 13:52:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-12-12 17:38:35 -0800 |
| commit | 8c4894c6bc790d0e31e072202939ac6747bbe7ac (patch) | |
| tree | 9ebb05f3ccb1e5f810f25916cf61a8913eaca1fe | |
| parent | 4128997b5f0e7ad583a5f3990051b8188b39055c (diff) | |
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 <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Wu Fengguang <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/hugetlb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index bd22bd895299..e53f39cd67db 100644 --- a/mm/hugetlb.c +++ b/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); /* |