From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754095Ab1D3LSy (ORCPT ); Sat, 30 Apr 2011 07:18:54 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:62938 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752824Ab1D3LSx (ORCPT ); Sat, 30 Apr 2011 07:18:53 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=EWpzB0BHbuL0fiPkqTq+Rt1JecWBVfRRO3LQgHm26rdSjPWA14+3K5qFJGZ83/ikCR 8BN0lC1Q3tCsFg8Q6RM/zh6zya66PsQVwGWLY7lW+Nx8RbPqJmEWMM1xjiUUT2XLCaDe zdsV7aa0yXzfZN6TSAewZy4xltl9ohu5u4ZgE= Date: Sat, 30 Apr 2011 13:18:49 +0200 From: Tejun Heo To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Thilo-Alexander Ginkel Subject: [GIT PULL] workqueue: fix possible deadlock on non-preemptive kernels Message-ID: <20110430111849.GA29280@htj.dyndns.org> References: <20110430111526.GA28147@htj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110430111526.GA28147@htj.dyndns.org> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (Sorry, the original posting was missing subject line. Resending.) Hello, Linus. Please pull from the following branch to receive fix for a deadlock which can happen between rescuers and stop_machine() while bringing down CPUs on non-preemptive kernels. The problem could be half-reliably reproduced by Thilo-Alexander while the system is entering suspend. The branch also contains another commit which documents workqueue debugging tricks. The pull will cause conflict against 25985edced (Fix common misspellings). The fixed misspelling unfortunately was in the comment which the fix replaces. The conflict can be resolved by simply taking the version from the fix commit. git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git fixes-2.6.39 Thank you. Florian Mickler (1): workqueue: Document debugging tricks Tejun Heo (1): workqueue: fix deadlock in worker_maybe_bind_and_lock() Documentation/workqueue.txt | 40 ++++++++++++++++++++++++++++++++++++++++ kernel/workqueue.c | 8 +++++++- 2 files changed, 47 insertions(+), 1 deletions(-) -- tejun