From: Minchan Kim <minchan@kernel.org>
Date: Fri, 21 Sep 2012 00:57:45 +0000 (+1000)
Subject: mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration-fix
X-Git-Tag: next-20120921~6^2~237
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f7986eab8fe20b85b9f69d374725a9b2a228fb9b;p=karo-tx-linux.git

mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration-fix

It is possible for pages to be dirty after the check
in reclaim_clean_pages_from_list so that it ends up
paging out the pages, which is never what we want for speed up.

This patch fixes it.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/vmscan.c b/mm/vmscan.c
index f8f56f8bc9c7..1ee4b69a28a5 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -694,7 +694,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
 		struct address_space *mapping;
 		struct page *page;
 		int may_enter_fs;
-		enum page_references references = PAGEREF_RECLAIM;
+		enum page_references references = PAGEREF_RECLAIM_CLEAN;
 
 		cond_resched();