linux-kernel - [PATCH 2/2] mm/hwpoison-inject: check PageLRU of hpage

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Message-ID: <1429236509-8796-2-git-send-email-n-horiguchi@ah.jp.nec.com>
Date:	Fri, 17 Apr 2015 02:08:52 +0000
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Dean Nelson <dnelson@...hat.com>, Andi Kleen <andi@...stfloor.org>,
	"Andrea Arcangeli" <aarcange@...hat.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] mm/hwpoison-inject: check PageLRU of hpage

Hwpoison injector checks PageLRU of the raw target page to find out whether
the page is an appropriate target, but current code now filters out thp tail
pages, which prevents us from testing for such cases via this interface.
So let's check hpage instead of p.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
---
 mm/hwpoison-inject.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git v4.0.orig/mm/hwpoison-inject.c v4.0/mm/hwpoison-inject.c
index 2b3f933e3282..4ca5fe0042e1 100644
--- v4.0.orig/mm/hwpoison-inject.c
+++ v4.0/mm/hwpoison-inject.c
@@ -34,12 +34,12 @@ static int hwpoison_inject(void *data, u64 val)
 	if (!hwpoison_filter_enable)
 		goto inject;
 
-	if (!PageLRU(p) && !PageHuge(p))
-		shake_page(p, 0);
+	if (!PageLRU(hpage) && !PageHuge(p))
+		shake_page(hpage, 0);
 	/*
 	 * This implies unable to support non-LRU pages.
 	 */
-	if (!PageLRU(p) && !PageHuge(p))
+	if (!PageLRU(hpage) && !PageHuge(p))
 		goto put_out;
 
 	/*
-- 
2.1.0
--
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