From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753798Ab3A2Azx (ORCPT ); Mon, 28 Jan 2013 19:55:53 -0500 Received: from na3sys010aog104.obsmtp.com ([74.125.245.76]:49055 "HELO na3sys010aog104.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751326Ab3A2Azv (ORCPT ); Mon, 28 Jan 2013 19:55:51 -0500 X-Greylist: delayed 368 seconds by postgrey-1.27 at vger.kernel.org; Mon, 28 Jan 2013 19:55:51 EST Message-ID: <51071CA0.801@ravellosystems.com> Date: Tue, 29 Jan 2013 02:49:36 +0200 From: Izik Eidus User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: Andrew Morton CC: Hugh Dickins , Petr Holasek , Andrea Arcangeli , Rik van Riel , David Rientjes , Anton Arapov , Mel Gorman , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/11] ksm: NUMA trees and page migration References: <20130128155452.16882a6e.akpm@linux-foundation.org> In-Reply-To: <20130128155452.16882a6e.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/29/2013 01:54 AM, Andrew Morton wrote: > On Fri, 25 Jan 2013 17:53:10 -0800 (PST) > Hugh Dickins 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? 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?