From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262641AbUCEQe4 (ORCPT ); Fri, 5 Mar 2004 11:34:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262640AbUCEQez (ORCPT ); Fri, 5 Mar 2004 11:34:55 -0500 Received: from ns.suse.de ([195.135.220.2]:28832 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S262642AbUCEQey (ORCPT ); Fri, 5 Mar 2004 11:34:54 -0500 Date: Wed, 10 Mar 2004 14:21:25 +0100 From: Andi Kleen To: Ingo Molnar Cc: andrea@suse.de, peter@mysql.com, akpm@osdl.org, riel@redhat.com, mbligh@aracnet.com, linux-kernel@vger.kernel.org Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end) Message-Id: <20040310142125.6f448d28.ak@suse.de> In-Reply-To: <20040305162319.GA16835@elte.hu> References: <20040229014357.GW8834@dualathlon.random> <1078370073.3403.759.camel@abyss.local> <20040303193343.52226603.akpm@osdl.org> <1078371876.3403.810.camel@abyss.local> <20040305103308.GA5092@elte.hu> <20040305141504.GY4922@dualathlon.random> <20040305143425.GA11604@elte.hu> <20040305145947.GA4922@dualathlon.random> <20040305150225.GA13237@elte.hu> <20040305162319.GA16835@elte.hu> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 5 Mar 2004 17:23:19 +0100 Ingo Molnar wrote: > > [...] Only drawback is that if a timer tick is delayed for too long it > > won't fix that, but I guess that's reasonable for a 1s resolution. > > what do you mean by delayed? Normal gettimeofday can "fix" lost timer ticks because it computes the true offset to the last timer interrupt using the TSC or other means. xtime is always the last tick without any correction. If it got delayed too much the result will be out of date. -Andi