linux-kernel - Re: [RFC PATCH 0/2] Removal of lumpy reclaim

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Date:	Fri, 6 Apr 2012 13:31:14 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Mel Gorman <mgorman@...e.de>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [RFC PATCH 0/2] Removal of lumpy reclaim

On Fri, 6 Apr 2012, Andrew Morton wrote:
> On Wed, 28 Mar 2012 17:06:21 +0100
> Mel Gorman <mgorman@...e.de> wrote:
> 
> > (cc'ing active people in the thread "[patch 68/92] mm: forbid lumpy-reclaim
> > in shrink_active_list()")
> > 
> > In the interest of keeping my fingers from the flames at LSF/MM, I'm
> > releasing an RFC for lumpy reclaim removal.
> 
> I grabbed them, thanks.

I do have a concern with this: I was expecting lumpy reclaim to be
replaced by compaction, and indeed it is when CONFIG_COMPACTION=y.
But when CONFIG_COMPACTION is not set, we're back to 2.6.22 in
relying upon blind chance to provide order>0 pages.

Hugh
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