linux-kernel - Re: [PATCH 0/11] ksm: NUMA trees and page migration

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Message-ID: <alpine.LNX.2.00.1301281701010.4947@eggly.anvils>
Date:	Mon, 28 Jan 2013 17:07:15 -0800 (PST)
From:	Hugh Dickins <hughd@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	Petr Holasek <pholasek@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Izik Eidus <izik.eidus@...ellosystems.com>,
	Rik van Riel <riel@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Anton Arapov <anton@...hat.com>, Mel Gorman <mgorman@...e.de>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH 0/11] ksm: NUMA trees and page migration

On Mon, 28 Jan 2013, Andrew Morton wrote:
> On Fri, 25 Jan 2013 17:53:10 -0800 (PST)
> Hugh Dickins <hughd@...gle.com> wrote:
> 
> > Here's a KSM series
> 
> Sanity check: do you have a feeling for how useful KSM is? 
> Performance/space improvements for typical (or atypical) workloads? 
> Are people using it?  Successfully?
> 
> IOW, is it justifying itself?

I have no idea!  To me it's simply a technical challenge - and I agree
with your implication that that's not a good enough justification.

I've added Marcelo and Gleb and the KVM list to the Cc:
my understanding is that it's the KVM guys who really appreciate KSM.

Hugh
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