linux-kernel - Re: [PATCH 00/27] Latest numa/core release, v16

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Message-ID: <20121121105837.GV8218@suse.de>
Date:	Wed, 21 Nov 2012 10:58:37 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Rik van Riel <riel@...hat.com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Christoph Lameter <cl@...ux.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 00/27] Latest numa/core release, v16

On Mon, Nov 19, 2012 at 07:41:16PM -0500, Rik van Riel wrote:
> On 11/19/2012 06:00 PM, Mel Gorman wrote:
> >On Mon, Nov 19, 2012 at 11:36:04PM +0100, Ingo Molnar wrote:
> >>
> >>* Mel Gorman <mgorman@...e.de> wrote:
> >>
> >>>Ok.
> >>>
> >>>In response to one of your later questions, I found that I had
> >>>in fact disabled THP without properly reporting it. [...]
> >>
> >>Hugepages is a must for most forms of NUMA/HPC.
> >
> >Requiring huge pages to avoid a regression is a mistake.
> 
> Not all architectures support THP.  Not all workloads will end up
> using THP effectively.
> 
> Mel, would you have numa/core profiles from !THP runs, so we can
> find out the cause of the regression?
> 

Unfortunately not. I'll queue up a profile run again when I can but as
the !profile runs are still going it could take a while. It might be the
weekend before they even start.

-- 
Mel Gorman
SUSE Labs
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