linux-kernel - Re: [PATCH 01/10] vmscan: kill prev

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Message-ID: <20100416223758.GD20640@cmpxchg.org>
Date:	Sat, 17 Apr 2010 00:37:58 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Chris Mason <chris.mason@...cle.com>,
	Dave Chinner <david@...morbit.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 01/10] vmscan: kill prev_priority completely

On Thu, Apr 15, 2010 at 06:21:34PM +0100, 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 thghout 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>
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