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

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Date:	Tue, 29 Jan 2013 04:26:13 +0200
From:	Izik Eidus <izik.eidus@...ellosystems.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Hugh Dickins <hughd@...gle.com>,
	Petr Holasek <pholasek@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.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
Subject: Re: [PATCH 0/11] ksm: NUMA trees and page migration

On 01/29/2013 02:49 AM, Izik Eidus wrote:
> On 01/29/2013 01:54 AM, 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?


BTW, After thinking a bit about the word people, I wanted to see if 
normal users of linux
that just download and install Linux (without using special 
virtualization product) are able to use it.
So I google little bit for it, and found some nice results from users:
http://serverascode.com/2012/11/11/ksm-kvm.html

But I do agree that it provide justifying value only for virtualization 
users...

>
> Hi,
> I think it mostly used for virtualization, I know at least two 
> products that it use -
> RHEV - RedHat enterprise virtualization, and my current place (Ravello 
> Systems) that use it to do vm consolidation on top of cloud enviorments
> (Run multiple unmodified VMs on top of one vm you get from ec2 / 
> rackspace / what so ever), for Ravello it is highly critical in 
> achieving high rate
> of consolidation ratio...
>
>>
>> IOW, is it justifying itself?
>

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