linux-kernel - [PATCH] vmscan: zone_reclaim don't call disable_swap

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Message-Id: <20100625173002.8052.A69D9226@jp.fujitsu.com>
Date:	Fri, 25 Jun 2010 17:31:10 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Rik van Riel <riel@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH] vmscan: zone_reclaim don't call disable_swap_token()

Swap token don't works when zone reclaim is enabled since it was born.
Because __zone_reclaim() always call disable_swap_token()
unconditionally.

This kill swap token feature completely. As far as I know, nobody want
to that. Remove it.

Cc: Rik van Riel <riel@...hat.com>
Cc: Christoph Lameter <cl@...ux-foundation.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/vmscan.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9c7e57c..0c961f1 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2590,7 +2590,6 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
 	};
 	unsigned long slab_reclaimable;
 
-	disable_swap_token();
 	cond_resched();
 	/*
 	 * We need to be able to allocate from the reserves for RECLAIM_SWAP
-- 
1.6.5.2



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