From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751006AbXCYOfZ (ORCPT ); Sun, 25 Mar 2007 10:35:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750964AbXCYOfZ (ORCPT ); Sun, 25 Mar 2007 10:35:25 -0400 Received: from sj-iport-6.cisco.com ([171.71.176.117]:42932 "EHLO sj-iport-6.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928AbXCYOfY (ORCPT ); Sun, 25 Mar 2007 10:35:24 -0400 To: Ingo Molnar Cc: linux-kernel@vger.kernel.org Subject: Re: Early hang with 2.6.21-rc4-rt1 X-Message-Flag: Warning: May contain useful information References: <20070325073146.GB10734@elte.hu> From: Roland Dreier Date: Sun, 25 Mar 2007 07:35:22 -0700 In-Reply-To: <20070325073146.GB10734@elte.hu> (Ingo Molnar's message of "Sun, 25 Mar 2007 09:31:46 +0200") Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.4.19 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 25 Mar 2007 14:35:22.0946 (UTC) FILETIME=[D216CA20:01C76EEA] Authentication-Results: sj-dkim-3; header.From=rdreier@cisco.com; dkim=pass ( sig from cisco.com/sjdkim3002 verified; ); Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > I'm trying to use 2.6.21-rc4-rt1 to track down who's keeping > > interrupts off for too long. [...] > btw., is this something you know for sure (if yes, how do you know?) - > or is it that you would like to double-check the irqs-off times of > v2.6.21-to-be? I finally got curious enough to want to debug why starting kvm with tun/tap networking produces a bunch of rtc: lost some interrupts at 1024Hz. messages. So I'm assuming it's a ~millisecond irqs-off section somewhere. - R.