From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161133AbVICEse (ORCPT ); Sat, 3 Sep 2005 00:48:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161134AbVICEse (ORCPT ); Sat, 3 Sep 2005 00:48:34 -0400 Received: from omta03ps.mx.bigpond.com ([144.140.82.155]:36781 "EHLO omta03ps.mx.bigpond.com") by vger.kernel.org with ESMTP id S1161133AbVICEsd (ORCPT ); Sat, 3 Sep 2005 00:48:33 -0400 Message-ID: <43192B1E.4020208@bigpond.net.au> Date: Sat, 03 Sep 2005 14:48:30 +1000 From: Peter Williams User-Agent: Mozilla Thunderbird 1.0.6-1.1.fc4 (X11/20050720) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Lee Revell CC: vatsa@in.ibm.com, linux-kernel@vger.kernel.org, arjan@infradead.org, s0348365@sms.ed.ac.uk, kernel@kolivas.org, tytso@mit.edu, cfriesen@nortel.com, trenn@suse.de, george@mvista.com, johnstul@us.ibm.com, akpm@osdl.org Subject: Re: [PATCH 1/3] Updated dynamic tick patches - Fix lost tick calculation in timer_pm.c References: <20050831165843.GA4974@in.ibm.com> <20050831171211.GB4974@in.ibm.com> <1125720301.4991.41.camel@mindpipe> <43192423.2040400@bigpond.net.au> <1125722069.4991.43.camel@mindpipe> In-Reply-To: <1125722069.4991.43.camel@mindpipe> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Authentication-Info: Submitted using SMTP AUTH PLAIN at omta03ps.mx.bigpond.com from [147.10.133.38] using ID pwil3058@bigpond.net.au at Sat, 3 Sep 2005 04:48:31 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Lee Revell wrote: > On Sat, 2005-09-03 at 14:18 +1000, Peter Williams wrote: > >>In my experience, turning off DMA for IDE disks is a pretty good way to >>generate lost ticks :-) > > > For this to "work" you have to unset "unmask IRQ" with hdparm, right? I'm not familiar with that method. When I've experienced this it's been due to me accidentally not configuring IDE DMA during configuration. Peter -- Peter Williams pwil3058@bigpond.net.au "Learning, n. The kind of ignorance distinguishing the studious." -- Ambrose Bierce