From: Xishi Qiu <qiuxishi@huawei.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Tang Chen <tangchen@cn.fujitsu.com>,
zhongjiang@huawei.com,
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Linux MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] mm: fix overflow in find_zone_movable_pfns_for_nodes()
Date: Wed, 30 Sep 2015 17:33:42 +0800 [thread overview]
Message-ID: <560BAC76.6050002@huawei.com> (raw)
If user set "movablecore=xx" to a large number, corepages will overflow,
this patch fix the problem.
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
---
mm/page_alloc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 48aaf7b..af3c9bd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5668,6 +5668,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
*/
required_movablecore =
roundup(required_movablecore, MAX_ORDER_NR_PAGES);
+ required_movablecore = min(totalpages, required_movablecore);
corepages = totalpages - required_movablecore;
required_kernelcore = max(required_kernelcore, corepages);
--
2.0.0
--
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next reply other threads:[~2015-09-30 9:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 9:33 Xishi Qiu [this message]
2015-09-30 10:31 ` [PATCH] mm: fix overflow in find_zone_movable_pfns_for_nodes() Tang Chen
2015-09-30 21:03 ` David Rientjes
2015-10-01 20:02 ` Yasuaki Ishimatsu
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