linux-kernel - [PATCH 09/10] HWPOISON, hugetlb: fix unpoison for hugepage

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Date:	Wed,  8 Sep 2010 10:19:40 +0900
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Wu Fengguang <fengguang.wu@...el.com>,
	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 09/10] HWPOISON, hugetlb: fix unpoison for hugepage

Currently unpoisoning hugepages doesn't work correctly because
clearing PG_HWPoison is done outside if (TestClearPageHWPoison).
This patch fixes it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@...jp.nec.com>
---
 mm/memory-failure.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git v2.6.36-rc2/mm/memory-failure.c v2.6.36-rc2/mm/memory-failure.c
index 1d0392d..483a59f 100644
--- v2.6.36-rc2/mm/memory-failure.c
+++ v2.6.36-rc2/mm/memory-failure.c
@@ -1202,9 +1202,9 @@ int unpoison_memory(unsigned long pfn)
 		pr_debug("MCE: Software-unpoisoned page %#lx\n", pfn);
 		atomic_long_sub(nr_pages, &mce_bad_pages);
 		freeit = 1;
+		if (PageHuge(page))
+			clear_page_hwpoison_huge_page(page);
 	}
-	if (PageHuge(p))
-		clear_page_hwpoison_huge_page(page);
 	unlock_page(page);
 
 	put_page(page);
-- 
1.7.2.2

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