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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-09-30 13:45:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-30 14:31:02 -0700
commit2d421acd1568cf2d83739a1afec8e18edb9e3d16 (patch)
tree4c96dfcd9036bac702647259b804e752e29696d7 /mm
parente76d30e20be5fca46c185a1470b045b89f95edcb (diff)
downloadlinux-stericsson-2d421acd1568cf2d83739a1afec8e18edb9e3d16.tar.gz
mm/hwpoison: fix false report on 2nd attempt at page recovery
If the page is poisoned by software injection w/ MF_COUNT_INCREASED flag, there is a false report during the 2nd attempt at page recovery which is not truthful. This patch fixes it by reporting the first attempt to try free buddy page recovery if MF_COUNT_INCREASED is set. Before patch: [ 346.332041] Injecting memory failure at pfn 200010 [ 346.332189] MCE 0x200010: free buddy, 2nd try page recovery: Delayed After patch: [ 297.742600] Injecting memory failure at pfn 200010 [ 297.742941] MCE 0x200010: free buddy page recovery: Delayed Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Wanpeng Li <liwanp@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')
-rw-r--r--mm/memory-failure.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 3faba33c67cc..bf3351b5115e 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1114,8 +1114,10 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
* shake_page could have turned it free.
*/
if (is_free_buddy_page(p)) {
- action_result(pfn, "free buddy, 2nd try",
- DELAYED);
+ if (flags & MF_COUNT_INCREASED)
+ action_result(pfn, "free buddy", DELAYED);
+ else
+ action_result(pfn, "free buddy, 2nd try", DELAYED);
return 0;
}
action_result(pfn, "non LRU", IGNORED);