mm/hwpoison: fix false report on 2nd attempt at page recovery
authorWanpeng Li <liwanp@linux.vnet.ibm.com>
Mon, 30 Sep 2013 20:45:23 +0000 (13:45 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 30 Sep 2013 21:31:02 +0000 (14:31 -0700)
commit2d421acd1568cf2d83739a1afec8e18edb9e3d16
tree4c96dfcd9036bac702647259b804e752e29696d7
parente76d30e20be5fca46c185a1470b045b89f95edcb
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>
mm/memory-failure.c