From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [Bugme-new] [Bug 14794] New: IP address assigned by DHCP is dropped after ~40 seconds Date: Thu, 17 Dec 2009 13:24:51 -0800 Message-ID: <20091217132451.b168a796.akpm@linux-foundation.org> References: <20091216154713.f082e7cf.akpm@linux-foundation.org> <4B2A9A40.90203@freemail.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Mike Galbraith , Peter Zijlstra , Ingo Molnar , netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org To: =?ISO-8859-1?Q?N=E9meth_M=E1rton?= Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:51804 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760002AbZLQV1M (ORCPT ); Thu, 17 Dec 2009 16:27:12 -0500 In-Reply-To: <4B2A9A40.90203@freemail.hu> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 17 Dec 2009 21:53:20 +0100 N__meth M__rton wrote: > Hi, > > I bisected the problem, see http://bugzilla.kernel.org/show_bug.cgi?id=14794 > for details. Any idea what is the relation between this problem and the found > patch? > Please don't update this report via the bugillla interface. See "(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface)." : 61cbe54d9479ad98283b2dda686deae4c34b2d59 is the first bad commit : commit 61cbe54d9479ad98283b2dda686deae4c34b2d59 : Author: Mike Galbraith : Date: Wed Sep 9 15:41:37 2009 +0200 : : sched: Keep kthreads at default priority Strange. Might be a timing thing bu a) I doubt if any kernel threads are involved in maintaining a DHCP lease and b) even if they were, such a race wouldn't be this repeatable. Maybe it was a bisection glitch. Did you try reverting just that patch, see if it fixed things again?