From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from spaceape10.eur.corp.google.com (spaceape10.eur.corp.google.com [172.28.16.144]) by smtp-out.google.com with ESMTP id l1J96DFJ016089 for ; Mon, 19 Feb 2007 09:06:13 GMT Received: from nf-out-0910.google.com (nfal35.prod.google.com [10.48.63.35]) by spaceape10.eur.corp.google.com with ESMTP id l1J9623B022763 for ; Mon, 19 Feb 2007 09:06:12 GMT Received: by nf-out-0910.google.com with SMTP id l35so2589519nfa for ; Mon, 19 Feb 2007 01:06:10 -0800 (PST) Message-ID: <6599ad830702190106m3f391de4x170326fef2e4872@mail.gmail.com> Date: Mon, 19 Feb 2007 01:06:10 -0800 From: "Paul Menage" Subject: Re: [RFC][PATCH][0/4] Memory controller (RSS Control) In-Reply-To: <20070219005441.7fa0eccc.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20070219065019.3626.33947.sendpatchset@balbir-laptop> <20070219005441.7fa0eccc.akpm@linux-foundation.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Balbir Singh , linux-kernel@vger.kernel.org, vatsa@in.ibm.com, ckrm-tech@lists.sourceforge.net, xemul@sw.ru, linux-mm@kvack.org, svaidy@linux.vnet.ibm.com, devel@openvz.org List-ID: On 2/19/07, Andrew Morton wrote: > > Alas, I fear this might have quite bad worst-case behaviour. One small > container which is under constant memory pressure will churn the > system-wide LRUs like mad, and will consume rather a lot of system time. > So it's a point at which container A can deleteriously affect things which > are running in other containers, which is exactly what we're supposed to > not do. I think it's OK for a container to consume lots of system time during reclaim, as long as we can account that time to the container involved (i.e. if it's done during direct reclaim rather than by something like kswapd). Churning the LRU could well be bad though, I agree. Paul -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org