linux-kernel - [PATCH 3.12 115/144] mm/mempolicy: correct putback method for isolate pages if failed

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Date:	Mon,  6 Jan 2014 14:37:56 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>,
	Rafael Aquini <aquini@...hat.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Christoph Lameter <cl@...ux.com>,
	Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>,
	Rik van Riel <riel@...hat.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 3.12 115/144] mm/mempolicy: correct putback method for isolate pages if failed

3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joonsoo Kim <iamjoonsoo.kim@....com>

commit b0e5fd7359f1ce8db4ccb862b3aa80d2f2cbf4d0 upstream.

queue_pages_range() isolates hugetlbfs pages and putback_lru_pages()
can't handle these.  We should change it to putback_movable_pages().

Naoya said that it is worth going into stable, because it can break
in-use hugepage list.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
Acked-by: Rafael Aquini <aquini@...hat.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Reviewed-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Rik van Riel <riel@...hat.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Zhang Yanfei <zhangyanfei@...fujitsu.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 mm/mempolicy.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1317,7 +1317,7 @@ static long do_mbind(unsigned long start
 		if (nr_failed && (flags & MPOL_MF_STRICT))
 			err = -EIO;
 	} else
-		putback_lru_pages(&pagelist);
+		putback_movable_pages(&pagelist);
 
 	up_write(&mm->mmap_sem);
  mpol_out:


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