linux-ext4 - Re: [PATCH 1/2] mm: vmscan: Correct use of pgdat_balanced in sleeping

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Message-ID: <20110516152608.GT16531@cmpxchg.org>
Date:	Mon, 16 May 2011 17:26:08 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Colin King <colin.king@...onical.com>,
	Raghavendra D Prabhu <raghu.prabhu13@...il.com>,
	Jan Kara <jack@...e.cz>, Chris Mason <chris.mason@...cle.com>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	stable <stable@...nel.org>
Subject: Re: [PATCH 1/2] mm: vmscan: Correct use of pgdat_balanced in
 sleeping_prematurely

On Mon, May 16, 2011 at 04:06:56PM +0100, Mel Gorman wrote:
> From: Johannes Weiner <hannes@...xchg.org>
> 
> Johannes Weiner poined out that the logic in commit [1741c877: mm:
> kswapd: keep kswapd awake for high-order allocations until a percentage
> of the node is balanced] is backwards. Instead of allowing kswapd to go
> to sleep when balancing for high order allocations, it keeps it kswapd
> running uselessly.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>
> Reviewed-by: Rik van Riel <riel@...hat.com>

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
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