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Message-Id: <20090529213537.2D2951D0294@basil.firstfloor.org>
Date: Fri, 29 May 2009 23:35:37 +0200 (CEST)
From: Andi Kleen <andi@...stfloor.org>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, fengguang.wu@...el.com
Subject: [PATCH] [11/16] HWPOISON: Handle poisoned pages in set_page_dirty()
Bail out early in set_page_dirty for poisoned pages. We don't want any
of the dirty accounting done or file system write back started, because
the page will be just thrown away.
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
mm/page-writeback.c | 4 ++++
1 file changed, 4 insertions(+)
Index: linux/mm/page-writeback.c
===================================================================
--- linux.orig/mm/page-writeback.c 2009-05-29 23:32:08.000000000 +0200
+++ linux/mm/page-writeback.c 2009-05-29 23:32:10.000000000 +0200
@@ -1277,6 +1277,10 @@
{
struct address_space *mapping = page_mapping(page);
+ if (unlikely(PageHWPoison(page))) {
+ SetPageDirty(page);
+ return 0;
+ }
if (likely(mapping)) {
int (*spd)(struct page *) = mapping->a_ops->set_page_dirty;
#ifdef CONFIG_BLOCK
--
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