From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758001AbYENV5u (ORCPT ); Wed, 14 May 2008 17:57:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751072AbYENV5l (ORCPT ); Wed, 14 May 2008 17:57:41 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:46936 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751874AbYENV5k (ORCPT ); Wed, 14 May 2008 17:57:40 -0400 Date: Wed, 14 May 2008 22:46:00 +0100 From: Alan Cox To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Linus Torvalds , Andrew Morton , Peter Zijlstra , Thomas Gleixner , Alexander Viro Subject: Re: [announce] "kill the Big Kernel Lock (BKL)" tree Message-ID: <20080514224600.5bb5db5c@core> In-Reply-To: <20080514174955.GA515@elte.hu> References: <20080514174955.GA515@elte.hu> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 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 Out of amusement I took the watchdog drivers and started looking for large cans of worms in the BKL drop arena. Here is a fun one for general discussion - right now driver probe functions request resources. We have no ordering on the requests so we have deadlocks if two drivers do resource requests for conflicting resources in reverse order. "Discuss" Alan