From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750833AbWDISG4 (ORCPT ); Sun, 9 Apr 2006 14:06:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750835AbWDISG4 (ORCPT ); Sun, 9 Apr 2006 14:06:56 -0400 Received: from mail.gmx.de ([213.165.64.20]:45963 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S1750833AbWDISG4 (ORCPT ); Sun, 9 Apr 2006 14:06:56 -0400 X-Authenticated: #14349625 Subject: Re: [patch][rfc] quell interactive feeding frenzy From: Mike Galbraith To: bert hubert Cc: Con Kolivas , lkml , Ingo Molnar , Andrew Morton , Nick Piggin , Peter Williams In-Reply-To: <20060409121436.GA28075@outpost.ds9a.nl> References: <1144402690.7857.31.camel@homer> <200604072256.27665.kernel@kolivas.org> <1144417064.8114.26.camel@homer> <200604072356.03580.kernel@kolivas.org> <1144419294.14231.7.camel@homer> <20060409111436.GA26533@outpost.ds9a.nl> <1144582778.13991.10.camel@homer> <20060409121436.GA28075@outpost.ds9a.nl> Content-Type: text/plain Date: Sun, 09 Apr 2006 20:07:41 +0200 Message-Id: <1144606061.7408.14.camel@homer> Mime-Version: 1.0 X-Mailer: Evolution 2.4.0 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2006-04-09 at 14:14 +0200, bert hubert wrote: > On Sun, Apr 09, 2006 at 01:39:38PM +0200, Mike Galbraith wrote: > > Ok, unusable may be overstated. Nonetheless, that bit of code causes > > serious problems. It makes my little PIII/500 test box trying to fill > > one 100Mbit local network unusable. That is not overstated. > > If you try to make a PIII/500 fill 100mbit of TCP/IP using lots of different > processes, that IS a corner load. > > I'm sure you can fix this (rare) workload but are you very sure you are not > killing off performance for other situations? Rare? What exactly is rare about a number of tasks serving data? I don't care if it's a P4 serving gigabit. If you have to divide your server into pieces (you do, and you know it) you're screwed. > I get flashbacks to the old days of the VM where we had lots patches around > that would all solve (more or less) real problems, but never all at the same > time.. I choose to take the high road here, and will not respond. -Mike