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Message-Id: <20140106223901.785350898@linuxfoundation.org>
Date: Mon, 6 Jan 2014 14:38:25 -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>,
Vlastimil Babka <vbabka@...e.cz>,
Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
Christoph Lameter <cl@...ux.com>,
Rafael Aquini <aquini@...hat.com>,
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 3.10 076/129] mm/compaction: respect ignore_skip_hint in update_pageblock_skip
3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joonsoo Kim <iamjoonsoo.kim@....com>
commit 6815bf3f233e0b10c99a758497d5d236063b010b upstream.
update_pageblock_skip() only fits to compaction which tries to isolate
by pageblock unit. If isolate_migratepages_range() is called by CMA, it
try to isolate regardless of pageblock unit and it don't reference
get_pageblock_skip() by ignore_skip_hint. We should also respect it on
update_pageblock_skip() to prevent from setting the wrong information.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
Acked-by: Vlastimil Babka <vbabka@...e.cz>
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: Rafael Aquini <aquini@...hat.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: 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/compaction.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -134,6 +134,10 @@ static void update_pageblock_skip(struct
bool migrate_scanner)
{
struct zone *zone = cc->zone;
+
+ if (cc->ignore_skip_hint)
+ return;
+
if (!page)
return;
--
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