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| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2012-12-12 13:52:30 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 17:38:35 -0800 |
| commit | 5f24ae585be985691c017b7ab90b3669dca32d6d (patch) | |
| tree | dac06218e6a4de27c20a63be1845a9a6be400373 /mm/rmap.c | |
| parent | 8c4894c6bc790d0e31e072202939ac6747bbe7ac (diff) | |
| download | lwn-5f24ae585be985691c017b7ab90b3669dca32d6d.tar.gz lwn-5f24ae585be985691c017b7ab90b3669dca32d6d.zip | |
hwpoison, hugetlbfs: fix RSS-counter warning
Memory error handling on hugepages can break a RSS counter, which emits a
message like "Bad rss-counter state mm:ffff88040abecac0 idx:1 val:-1".
This is because PageAnon returns true for hugepage (this behavior is
necessary for reverse mapping to work on hugetlbfs).
[akpm@linux-foundation.org: clean up code layout]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index cf7e99a87c32..face808a489e 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1249,12 +1249,14 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, update_hiwater_rss(mm); if (PageHWPoison(page) && !(flags & TTU_IGNORE_HWPOISON)) { - if (PageAnon(page)) - dec_mm_counter(mm, MM_ANONPAGES); - else - dec_mm_counter(mm, MM_FILEPAGES); + if (!PageHuge(page)) { + if (PageAnon(page)) + dec_mm_counter(mm, MM_ANONPAGES); + else + dec_mm_counter(mm, MM_FILEPAGES); + } set_pte_at(mm, address, pte, - swp_entry_to_pte(make_hwpoison_entry(page))); + swp_entry_to_pte(make_hwpoison_entry(page))); } else if (PageAnon(page)) { swp_entry_t entry = { .val = page_private(page) }; |