linux-kernel - Re: [PATCH 09/10] mm: vmscan: Check if kswapd should writepage once per priority

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Message-ID: <20130321180735.GN1878@suse.de>
Date:	Thu, 21 Mar 2013 18:07:35 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	Linux-MM <linux-mm@...ck.org>, Jiri Slaby <jslaby@...e.cz>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Rik van Riel <riel@...hat.com>,
	Zlatko Calusic <zcalusic@...sync.net>,
	Johannes Weiner <hannes@...xchg.org>,
	dormando <dormando@...ia.net>,
	Satoru Moriya <satoru.moriya@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/10] mm: vmscan: Check if kswapd should writepage once
 per priority

On Thu, Mar 21, 2013 at 05:58:37PM +0100, Michal Hocko wrote:
> On Sun 17-03-13 13:04:15, Mel Gorman wrote:
> > Currently kswapd checks if it should start writepage as it shrinks
> > each zone without taking into consideration if the zone is balanced or
> > not. This is not wrong as such but it does not make much sense either.
> > This patch checks once per priority if kswapd should be writing pages.
> 
> Except it is not once per priority strictly speaking...  It doesn't make
> any difference though.
> 

Whoops, at one point during development it really was once per priority
which was always raised. I reworded it to "once per pgdat scan".

Thanks.

-- 
Mel Gorman
SUSE Labs
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