Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH 3/3] HWPOISON, hugetlbfs: fix RSS-counter warning | Date | Wed, 5 Dec 2012 16:47:38 -0500 |
| |
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).
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> --- mm/rmap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git v3.7-rc8.orig/mm/rmap.c v3.7-rc8/mm/rmap.c index 2ee1ef0..df54ef0 100644 --- v3.7-rc8.orig/mm/rmap.c +++ v3.7-rc8/mm/rmap.c @@ -1235,7 +1235,9 @@ 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)) + if (PageHuge(page)) + ; + else if (PageAnon(page)) dec_mm_counter(mm, MM_ANONPAGES); else dec_mm_counter(mm, MM_FILEPAGES); -- 1.7.11.7
| |