From: Andi Kleen <andi@firstfloor.org>
To: linux-kernel@vger.kernel.org
Cc: fengguang.wu@intel.com, linux-mm@kvack.org,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 4/4] HWPOISON: Stop shrinking at right page count
Date: Wed, 6 Oct 2010 22:49:01 +0200 [thread overview]
Message-ID: <1286398141-13749-5-git-send-email-andi@firstfloor.org> (raw)
In-Reply-To: <1286398141-13749-1-git-send-email-andi@firstfloor.org>
From: Andi Kleen <ak@linux.intel.com>
When we call the slab shrinker to free a page we need to stop at
page count one because the caller always holds a single reference, not zero.
This avoids useless looping over slab shrinkers and freeing too much
memory.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
mm/memory-failure.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 886144b..7c1af9b 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -237,7 +237,7 @@ void shake_page(struct page *p, int access)
int nr;
do {
nr = shrink_slab(1000, GFP_KERNEL, 1000);
- if (page_count(p) == 0)
+ if (page_count(p) == 1)
break;
} while (nr > 10);
}
--
1.7.1
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next prev parent reply other threads:[~2010-10-06 20:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-06 20:48 HWPoison fixes for 2.6.36 Andi Kleen
2010-10-06 20:48 ` [PATCH 1/4] page-types.c: fix name of unpoison interface Andi Kleen
2010-10-06 20:48 ` [PATCH 2/4] HWPOISON: Copy si_addr_lsb to user Andi Kleen
2010-10-07 0:27 ` Naoya Horiguchi
2010-10-07 6:31 ` Hidetoshi Seto
2010-10-07 7:36 ` Andi Kleen
2010-10-08 17:09 ` Ralf Baechle
2010-10-08 17:32 ` Andi Kleen
2010-10-06 20:49 ` [PATCH 3/4] HWPOISON: Report correct address granuality for AO huge page errors Andi Kleen
2010-10-07 0:31 ` Naoya Horiguchi
2010-10-07 7:38 ` Andi Kleen
2010-10-07 8:41 ` Naoya Horiguchi
2010-10-07 8:45 ` Andi Kleen
2010-10-07 8:48 ` Naoya Horiguchi
2010-10-07 8:58 ` Andi Kleen
2010-10-07 1:50 ` Wu Fengguang
2010-10-06 20:49 ` Andi Kleen [this message]
2010-10-07 1:53 ` [PATCH 4/4] HWPOISON: Stop shrinking at right page count Wu Fengguang
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