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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-09-30 13:45:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-30 14:31:02 -0700
commite76d30e20be5fca46c185a1470b045b89f95edcb (patch)
treec1f7d396eb6009f9d11df8d9bb34ad430efd7941 /mm/memory-failure.c
parent20cb6cab52a21b46e3c0dc7bd23f004f810fb421 (diff)
downloadlinaro-lsk-e76d30e20be5fca46c185a1470b045b89f95edcb.tar.gz
mm/hwpoison: fix test for a transparent huge page
PageTransHuge() can't guarantee the page is a transparent huge page since it returns true for both transparent huge and hugetlbfs pages. This patch fixes it by checking the page is also !hugetlbfs page. Before patch: [ 121.571128] Injecting memory failure at pfn 23a200 [ 121.571141] MCE 0x23a200: huge page recovery: Delayed [ 140.355100] MCE: Memory failure is now running on 0x23a200 After patch: [ 94.290793] Injecting memory failure at pfn 23a000 [ 94.290800] MCE 0x23a000: huge page recovery: Delayed [ 105.722303] MCE: Software-unpoisoned page 0x23a000 Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory-failure.c')
-rw-r--r--mm/memory-failure.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 947ed541327..3faba33c67c 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1349,7 +1349,7 @@ int unpoison_memory(unsigned long pfn)
* worked by memory_failure() and the page lock is not held yet.
* In such case, we yield to memory_failure() and make unpoison fail.
*/
- if (PageTransHuge(page)) {
+ if (!PageHuge(page) && PageTransHuge(page)) {
pr_info("MCE: Memory failure is now running on %#lx\n", pfn);
return 0;
}