linux-kernel - Re: [PATCH 3/3] compaction accouting fix

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Message-ID: <20110831150300.GC19122@redhat.com>
Date:	Wed, 31 Aug 2011 17:03:00 +0200
From:	Johannes Weiner <jweiner@...hat.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 3/3] compaction accouting fix

On Wed, Aug 31, 2011 at 11:56:51PM +0900, Minchan Kim wrote:
> On Wed, Aug 31, 2011 at 01:37:10PM +0200, Johannes Weiner wrote:
> > It's a teensy-bit awkward that isolate_migratepages() can return
> > success without actually isolating any new pages, just because there
> > are still some pages left from a previous run (cc->nr_migratepages is
> > maintained across isolation calls).
> 
> If migrate_pages fails, we reset cc->nr_migratepages to zero in compact_zone.
> Am I missing something?

Brainfart on my side, sorry.  It's all good, then :)
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