HWPOISON: check dirty flag to match against clean page

Currently page_action() does not check dirty flag to determine whether
the error page is "clean mlocked/unevictable LRU" page.  This doesn't
cause any misjudgement because we do matching against "dirty
mlocked/unevictable LRU" just before the check.  But in order to make
code consistent and/or to avoid potential regression, we had better
check dirty flag explicitly.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Suggested-by: Chen Gong <gong.chen@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index df0694c..ceb0c7f 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -785,10 +785,10 @@ static struct page_state {
        { sc|dirty,     sc,             "clean swapcache",      me_swapcache_clean },
 
        { mlock|dirty,  mlock|dirty,    "dirty mlocked LRU",    me_pagecache_dirty },
-       { mlock,        mlock,          "clean mlocked LRU",    me_pagecache_clean },
+       { mlock|dirty,  mlock,          "clean mlocked LRU",    me_pagecache_clean },
 
        { unevict|dirty, unevict|dirty, "dirty unevictable LRU", me_pagecache_dirty },
-       { unevict,      unevict,        "clean unevictable LRU", me_pagecache_clean },
+       { unevict|dirty, unevict,       "clean unevictable LRU", me_pagecache_clean },
 
        { lru|dirty,    lru|dirty,      "dirty LRU",    me_pagecache_dirty },
        { lru|dirty,    lru,            "clean LRU",    me_pagecache_clean },