Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751877AbaFDTU3 (ORCPT ); Wed, 4 Jun 2014 15:20:29 -0400 Received: from mail-pb0-f54.google.com ([209.85.160.54]:39073 "EHLO mail-pb0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751818AbaFDTUZ (ORCPT ); Wed, 4 Jun 2014 15:20:25 -0400 Date: Wed, 4 Jun 2014 12:18:59 -0700 (PDT) From: Hugh Dickins X-X-Sender: hugh@eggly.anvils To: Johannes Weiner cc: Michal Hocko , Andrew Morton , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Greg Thelen , Michel Lespinasse , Tejun Heo , Hugh Dickins , Roman Gushchin , LKML , linux-mm@kvack.org, Rik van Riel Subject: Re: [PATCH v2 0/4] memcg: Low-limit reclaim In-Reply-To: <20140604154408.GT2878@cmpxchg.org> Message-ID: References: <1398688005-26207-1-git-send-email-mhocko@suse.cz> <20140528121023.GA10735@dhcp22.suse.cz> <20140528134905.GF2878@cmpxchg.org> <20140528142144.GL9895@dhcp22.suse.cz> <20140528152854.GG2878@cmpxchg.org> <20140528155414.GN9895@dhcp22.suse.cz> <20140528163335.GI2878@cmpxchg.org> <20140603110743.GD1321@dhcp22.suse.cz> <20140603142249.GP2878@cmpxchg.org> <20140604144658.GB17612@dhcp22.suse.cz> <20140604154408.GT2878@cmpxchg.org> User-Agent: Alpine 2.11 (LSU 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 4 Jun 2014, Johannes Weiner wrote: > On Wed, Jun 04, 2014 at 04:46:58PM +0200, Michal Hocko wrote: > > > > In the other email I have suggested to add a knob with the configurable > > default. Would you be OK with that? > > No, I want to agree on whether we need that fallback code or not. I'm > not interested in merging code that you can't convince anybody else is > needed. I for one would welcome such a knob as Michal is proposing. I thought it was long ago agreed that the low limit was going to fallback when it couldn't be satisfied. But you seem implacably opposed to that as default, and I can well believe that Google is so accustomed to OOMing that it is more comfortable with OOMing as the default. Okay. But I would expect there to be many who want the attempt towards isolation that low limit offers, without a collapse to OOM at the first misjudgement. Hugh -- 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/