From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759122AbYBARLT (ORCPT ); Fri, 1 Feb 2008 12:11:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756660AbYBARLK (ORCPT ); Fri, 1 Feb 2008 12:11:10 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:42942 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755957AbYBARLJ (ORCPT ); Fri, 1 Feb 2008 12:11:09 -0500 Date: Fri, 1 Feb 2008 18:10:22 +0100 From: Ingo Molnar To: Dmitry Adamushko Cc: Peter Zijlstra , "Rafael J. Wysocki" , Steven Rostedt , Andrew Morton , Linus Torvalds , LKML Subject: Re: [Regression] 2.6.24-git3: Major annoyance during suspend/hibernation on x86-64 (bisected) Message-ID: <20080201171022.GC2159@elte.hu> References: <200801272229.48955.rjw@sisk.pl> <200801280226.22013.rjw@sisk.pl> <1201795128.32654.22.camel@lappy> <200801312154.33754.rjw@sisk.pl> <1201867497.32654.49.camel@lappy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Dmitry Adamushko wrote: > On 01/02/2008, Peter Zijlstra wrote: > > > --- > > - restore the old wakeup mechanism > > and how does it change behavior, logically-wise? > > do we somehow miss a 'wake-up' from kthread_stop() so that its caller > gets blocked until watchdog's msleep_interruptible(10000) timeouts? On > average, it would take +-5 sec. and might explain the first > observation of Ravael -- "...adds a 5 - 10 sec delay..." (although, > lately he reported up to +30 sec. delays). > > (/me goint to also try reproducing it later today) thanks - i cannot reproduce it on my usual suspend/resume testbox because e1000 broke on it, and this is a pretty annoying regression. We'll have to undo the hung-tasks detection feature if it's not fixed quickly. (there's no point in debugging features that _add_ bugs) Ingo