From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756134Ab1KAWZc (ORCPT ); Tue, 1 Nov 2011 18:25:32 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:37843 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756071Ab1KAWZa convert rfc822-to-8bit (ORCPT ); Tue, 1 Nov 2011 18:25:30 -0400 MIME-Version: 1.0 Message-ID: <82d2f082-6ab1-479e-bbf9-f04992804420@default> Date: Tue, 1 Nov 2011 15:25:14 -0700 (PDT) From: Dan Magenheimer To: Andrew Morton Cc: KAMEZAWA Hiroyuki , Linus Torvalds , linux-mm@kvack.org, LKML , Konrad Wilk , Jeremy Fitzhardinge , Seth Jennings , ngupta@vflare.org, levinsasha928@gmail.com, Chris Mason , JBeulich@novell.com, Dave Hansen , Jonathan Corbet , Neo Jia Subject: RE: [GIT PULL] mm: frontswap (for 3.2 window) References: <20111031171321.097a166c.kamezawa.hiroyu@jp.fujitsu.com> <20111101095038.30289914.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20111101144309.a51c99b5.akpm@linux-foundation.org> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.4.1.0 (410211) [OL 12.0.6562.5003] Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT X-Source-IP: acsinet22.oracle.com [141.146.126.238] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090209.4EB071CF.0055,ss=1,re=0.000,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > From: Andrew Morton [mailto:akpm@linux-foundation.org] > Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window) > > On Tue, 1 Nov 2011 08:25:38 -0700 (PDT) > Dan Magenheimer wrote: > > At kernel summit there was discussion and overall agreement that we've > been paying insufficient attention to the big-picture "should we > include this feature at all" issues. We resolved to look more > intensely and critically at new features with a view to deciding > whether their usefulness justified their maintenance burden. It seems > that you're our crash-test dummy ;) (Now I'm wondering how to get > "cgroups: add a task counter subsystem" put through the same wringer). > > I will confess to and apologise for dropping the ball on cleancache and > frontswap. I was never really able to convince myself that it met the > (very vague) cost/benefit test, but nor was I able to present > convincing arguments that it failed that test. So I very badly went > into hiding, to wait and see what happened. What we needed all those > months ago was to have the discussion we're having now. > > This is a difficult discussion and a difficult decision. But it is > important that we get it right. Thanks for you patience. Thanks very much for your very kind response. Let me know if I can do anything else to help the process other than continuing the discussion of course. I'll be happy to help as soon as I return from the crash-test-dummy hospital ;-) Dan