Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754798AbXKXDth (ORCPT ); Fri, 23 Nov 2007 22:49:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751787AbXKXDt2 (ORCPT ); Fri, 23 Nov 2007 22:49:28 -0500 Received: from mx1.redhat.com ([66.187.233.31]:58422 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751649AbXKXDt1 (ORCPT ); Fri, 23 Nov 2007 22:49:27 -0500 Date: Sat, 24 Nov 2007 03:49:07 +0000 From: Alasdair G Kergon To: Torsten Kaiser Cc: Milan Broz , Ingo Molnar , Andrew Morton , Linux Kernel list Subject: Re: 2.6.24-rc2-mm1: kcryptd vs lockdep Message-ID: <20071124034907.GD22843@agk.fab.redhat.com> Mail-Followup-To: Alasdair G Kergon , Torsten Kaiser , Milan Broz , Ingo Molnar , Andrew Morton , Linux Kernel list References: <64bb37e0711182323v1e2a1341tfc7f20df771b988@mail.gmail.com> <20071119075627.GB28432@elte.hu> <64bb37e0711191134l6dac07a2ie3b4258c43e1f1f0@mail.gmail.com> <4741F97D.6090808@redhat.com> <64bb37e0711231442y7603366aib9642eab97e5be6b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <64bb37e0711231442y7603366aib9642eab97e5be6b@mail.gmail.com> User-Agent: Mutt/1.4.1i Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 745 Lines: 20 On Fri, Nov 23, 2007 at 11:42:36PM +0100, Torsten Kaiser wrote: > ... or I just don't see the bug. See my earlier post in this thread: there's a race in the write loop where a work struct could be used twice on the same queue. (Needs data structure change to fix that, which nobody has attempted to do yet.) BTW To eliminate any internal lockdep concerns (and people say there should be no problem) temporarily add a second struct instead of reusing one on two queues. Alasdair -- agk@redhat.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/