linux-kernel - Re: [PATCH 05/12] vmscan: kill prev

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Date:	Mon, 14 Jun 2010 14:04:30 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Christoph Hellwig <hch@...radead.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 05/12] vmscan: kill prev_priority completely

On 06/14/2010 07:17 AM, Mel Gorman wrote:
> From: KOSAKI Motohiro<kosaki.motohiro@...fujitsu.com>
>
> Since 2.6.28 zone->prev_priority is unused. Then it can be removed
> safely. It reduce stack usage slightly.
>
> Now I have to say that I'm sorry. 2 years ago, I thought prev_priority
> can be integrate again, it's useful. but four (or more) times trying
> haven't got good performance number. Thus I give up such approach.
>
> Signed-off-by: KOSAKI Motohiro<kosaki.motohiro@...fujitsu.com>
> Reviewed-by: Johannes Weiner<hannes@...xchg.org>
> Signed-off-by: Mel Gorman<mel@....ul.ie>

Reviewed-by: Rik van Riel <riel@...hat.com>

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