From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763274AbYBFAqw (ORCPT ); Tue, 5 Feb 2008 19:46:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760945AbYBFAqp (ORCPT ); Tue, 5 Feb 2008 19:46:45 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:52678 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760892AbYBFAqo (ORCPT ); Tue, 5 Feb 2008 19:46:44 -0500 Date: Tue, 5 Feb 2008 16:46:26 -0800 From: Andrew Morton To: Ingo Molnar Cc: Linux Kernel Mailing List Subject: Re: softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks Message-Id: <20080205164626.f9c920e0.akpm@linux-foundation.org> In-Reply-To: <200801252259.m0PMxHmD012059@hera.kernel.org> References: <200801252259.m0PMxHmD012059@hera.kernel.org> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 25 Jan 2008 22:59:17 GMT Linux Kernel Mailing List wrote: > Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=82a1fcb90287052aabfa235e7ffc693ea003fe69 > Commit: 82a1fcb90287052aabfa235e7ffc693ea003fe69 > Parent: d0d23b5432fe61229dd3641c5e94d4130bc4e61b > Author: Ingo Molnar > AuthorDate: Fri Jan 25 21:08:02 2008 +0100 > Committer: Ingo Molnar > CommitDate: Fri Jan 25 21:08:02 2008 +0100 > > softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks One of my test boxes (an 8-way x86_64 software-development thing from Intel - I'm not sure what's inside it) no longer powers itself off when I run `halt -pfn'. During bisection I found two different problems. Sometimes the machine wouldn't power off at all. Other times it would power off after a pause of around twenty seconds. Bisection indicates that this commit is what caused the 20-second pause. It could be that some later commit caused the infinity-second pause.