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Date: Wed, 18 Sep 2013 08:38:56 +0800 From: Wanpeng Li <liwanp@...ux.vnet.ibm.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Andi Kleen <andi@...stfloor.org>, Fengguang Wu <fengguang.wu@...el.com>, Naoya Horiguchi <n-horiguchi@...jp.nec.com>, Tony Luck <tony.luck@...el.com>, gong.chen@...ux.intel.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Wanpeng Li <liwanp@...ux.vnet.ibm.com> Subject: [PATCH v3 3/4] mm/hwpoison: fix false report 2nd try page recovery If the page is poisoned by software inject w/ MF_COUNT_INCREASED flag, there is a false report 2nd try page recovery which is not truth, this patch fix it by report first 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@...jp.nec.com> Acked-by: Andi Kleen <ak@...ux.intel.com> Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com> --- mm/memory-failure.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index ed41c63..615764c 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); -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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