Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S271832AbTGRPge (ORCPT ); Fri, 18 Jul 2003 11:36:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267576AbTGRPai (ORCPT ); Fri, 18 Jul 2003 11:30:38 -0400 Received: from imap.gmx.net ([213.165.64.20]:58547 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S271867AbTGRP0y (ORCPT ); Fri, 18 Jul 2003 11:26:54 -0400 Message-Id: <5.2.1.1.2.20030718174433.01b12878@pop.gmx.net> X-Mailer: QUALCOMM Windows Eudora Version 5.2.1 Date: Fri, 18 Jul 2003 17:46:01 +0200 To: Wiktor Wodecki From: Mike Galbraith Subject: Re: [PATCH] O6int for interactivity Cc: Nick Piggin , Davide Libenzi , Con Kolivas , linux kernel mailing list , Andrew Morton , Felipe Alfaro Solana , Zwane Mwaikambo In-Reply-To: <20030718103105.GE622@gmx.de> References: <5.2.1.1.2.20030718120229.01a8fcf0@pop.gmx.net> <5.2.1.1.2.20030718071656.01af84d0@pop.gmx.net> <200307170030.25934.kernel@kolivas.org> <200307170030.25934.kernel@kolivas.org> <5.2.1.1.2.20030718071656.01af84d0@pop.gmx.net> <5.2.1.1.2.20030718120229.01a8fcf0@pop.gmx.net> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=====================_17588671==_" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6628 Lines: 103 --=====================_17588671==_ Content-Type: text/plain; charset="us-ascii"; format=flowed At 12:31 PM 7/18/2003 +0200, Wiktor Wodecki wrote: >On Fri, Jul 18, 2003 at 12:18:33PM +0200, Mike Galbraith wrote: > > That _might_ (add salt) be priorities of kernel threads dropping too low. > > > > I'm also seeing occasional total stalls under heavy I/O in the order of > > 10-12 seconds (even the disk stops). I have no idea if that's > something in > > mm or the scheduler changes though, as I've yet to do any isolation and/or > > tinkering. All I know at this point is that I haven't seen it in stock > yet. > >I've seen this too while doing a huge nfs transfer from a 2.6 machine to >a 2.4 machine (sparc32). Thought it'd be something with the nfs changes >which were recently, might be the scheduler, tho. Ah, and it is fully >reproducable. Telling to not mess with my kernel threads seems to have fixed it here... no stalls during the whole contest run. 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