From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Tomt Subject: Re: [RFC][PATCH 2/9] deadlock prevention core Date: Sun, 20 Aug 2006 03:33:25 +0200 Message-ID: <44E7BBE5.1040600@tomt.net> References: <20060808211731.GR14627@postel.suug.ch> <44DBED4C.6040604@redhat.com> <44DFA225.1020508@google.com> <20060813.165540.56347790.davem@davemloft.net> <44DFD262.5060106@google.com> <20060813185309.928472f9.akpm@osdl.org> <1155530453.5696.98.camel@twins> <20060813215853.0ed0e973.akpm@osdl.org> <44E3E964.8010602@google.com> <20060816225726.3622cab1.akpm@osdl.org> <44E5015D.80606@google.com> <20060817230556.7d16498e.akpm@osdl.org> <44E62F7F.7010901@google.com> <20060818153455.2a3f2bcb.akpm@osdl.org> <44E650C1.80608@google.com> <20060818194435.25bacee0.akpm@osdl.org> <44E728E2.4000804@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Andrew Morton , Daniel Phillips , Peter Zijlstra , David Miller , tgraf@suug.ch, linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Mike Christie Return-path: Received: from mail1.skjellin.no ([80.239.42.67]:47576 "EHLO mx1.skjellin.no") by vger.kernel.org with ESMTP id S1751377AbWHTBdi (ORCPT ); Sat, 19 Aug 2006 21:33:38 -0400 To: Rik van Riel In-Reply-To: <44E728E2.4000804@redhat.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Rik van Riel wrote: > Andrew Morton wrote: > >> - We expect that the lots-of-dirty-anon-memory-over-swap-over-network >> scenario might still cause deadlocks. >> I assert that this can be solved by putting swap on local disks. >> Peter >> asserts that this isn't acceptable due to disk unreliability. I point >> out that local disk reliability can be increased via MD, all goes >> quiet. >> >> A good exposition which helps us to understand whether and why a >> significant proportion of the target user base still wishes to do >> swap-over-network would be useful. > > You cannot put disks in many models of blade servers. > > At all. Or many thin clients in general. They are used in quite a few schools over here, running Linux. Some of them do in fact have space for disks, but disks adds costs (heat, power, replacing failed drives)