Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752526Ab3EPQtf (ORCPT ); Thu, 16 May 2013 12:49:35 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:21959 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751742Ab3EPQtd convert rfc822-to-8bit (ORCPT ); Thu, 16 May 2013 12:49:33 -0400 MIME-Version: 1.0 Message-ID: Date: Thu, 16 May 2013 09:45:43 -0700 (PDT) From: Dan Magenheimer To: Rik van Riel Cc: Seth Jennings , Andrew Morton , Greg Kroah-Hartman , Nitin Gupta , Minchan Kim , Konrad Wilk , Robert Jennings , Jenifer Hopper , Mel Gorman , Johannes Weiner , Larry Woodman , Benjamin Herrenschmidt , Dave Hansen , Joe Perches , Joonsoo Kim , Cody P Schafer , Hugh Dickens , Paul Mackerras , linux-mm@kvack.org, linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org, Jonathan Corbet Subject: RE: [PATCHv11 3/4] zswap: add to mm/ References: <1368448803-2089-1-git-send-email-sjenning@linux.vnet.ibm.com> <1368448803-2089-4-git-send-email-sjenning@linux.vnet.ibm.com> <15c5b1da-132a-4c9e-9f24-bc272d3865d5@default> <20130514163541.GC4024@medulla> <519408D6.10903@redhat.com> In-Reply-To: <519408D6.10903@redhat.com> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.7 (607090) [OL 12.0.6668.5000 (x86)] Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2100 Lines: 45 > From: Rik van Riel [mailto:riel@redhat.com] > Sent: Wednesday, May 15, 2013 4:15 PM > To: Dan Magenheimer > Cc: Seth Jennings; Andrew Morton; Greg Kroah-Hartman; Nitin Gupta; Minchan Kim; Konrad Wilk; Robert > Jennings; Jenifer Hopper; Mel Gorman; Johannes Weiner; Larry Woodman; Benjamin Herrenschmidt; Dave > Hansen; Joe Perches; Joonsoo Kim; Cody P Schafer; Hugh Dickens; Paul Mackerras; linux-mm@kvack.org; > linux-kernel@vger.kernel.org; devel@driverdev.osuosl.org > Subject: Re: [PATCHv11 3/4] zswap: add to mm/ > > On 05/14/2013 04:18 PM, Dan Magenheimer wrote: > > > It's unfortunate that my proposed topic for LSFMM was pre-empted > > by the zsmalloc vs zbud discussion and zswap vs zcache, because > > I think the real challenge of zswap (or zcache) and the value to > > distros and end users requires us to get this right BEFORE users > > start filing bugs about performance weirdness. After which most > > users and distros will simply default to 0% (i.e. turn zswap off) > > because zswap unpredictably sometimes sucks. > > I'm not sure we can get it right before people actually start > using it for real world setups, instead of just running benchmarks > on it. > > The sooner we get the code out there, where users can play with > it (even if it is disabled by default and needs a sysfs or > sysctl config option to enable it), the sooner we will know how > well it works, and what needs to be changed. /me sets stage of first Star Wars (1977) /me envisions self as Obi-Wan Kenobi, old and tired of fighting, in lightsaber battle with protege Darth Vader / Anakin Skywalker /me sadly turns off lightsaber, holds useless handle at waist, takes a deep breath, and promptly gets sliced into oblivion. Time for A New Hope(tm). (/me cc's Jon Corbet for a longshot last chance of making LWN's Kernel Development Quotes of the Week.) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/