linux-kernel - [PATCH v2 3/7] mm/mempolicy: correct putback method for isolate pages if failed

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Date:	Mon,  9 Dec 2013 18:10:44 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Rafael Aquini <aquini@...hat.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <js1304@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Vlastimil Babka <vbabka@...e.cz>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 3/7] mm/mempolicy: correct putback method for isolate pages if failed

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.

Cc: <stable@...r.kernel.org> # 3.12
Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index eca4a31..6d04d37 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1318,7 +1318,7 @@ static long do_mbind(unsigned long start, unsigned long len,
 		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:
-- 
1.7.9.5

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