linux-kernel - [PATCH 1/3] balancenuma: put page if avoid migrating page

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Date:	Tue, 27 Nov 2012 21:23:59 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: [PATCH 1/3] balancenuma: put page if avoid migrating page

If we have to avoid migrating to a node that is nearly full, put page
and return zero.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/mm/migrate.c	Tue Nov 27 20:09:38 2012
+++ b/mm/migrate.c	Tue Nov 27 20:15:00 2012
@@ -1538,9 +1538,11 @@ int numamigrate_isolate_page(pg_data_t *
 			mod_zone_page_state(page_zone(page),
 					NR_ISOLATED_ANON + page_lru,
 					HPAGE_PMD_NR);
+		return 1;
 	}

-	return 1;
+	put_page(page);
+	return 0;
 }

 /*
--
--
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