From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262406AbUEGCuk (ORCPT ); Thu, 6 May 2004 22:50:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262476AbUEGCuk (ORCPT ); Thu, 6 May 2004 22:50:40 -0400 Received: from fw.osdl.org ([65.172.181.6]:16770 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262406AbUEGCuj (ORCPT ); Thu, 6 May 2004 22:50:39 -0400 Date: Thu, 6 May 2004 19:50:02 -0700 From: Andrew Morton To: Paul Jakma Cc: arjanv@redhat.com, Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org Subject: Re: 2.6.6-rc3-mm2 (4KSTACK) Message-Id: <20040506195002.520b0793.akpm@osdl.org> In-Reply-To: References: <20040505013135.7689e38d.akpm@osdl.org> <200405051312.30626.dominik.karall@gmx.net> <200405051822.i45IM2uT018573@turing-police.cc.vt.edu> <20040505215136.GA8070@wohnheim.fh-wedel.de> <200405061518.i46FIAY2016476@turing-police.cc.vt.edu> <1083858033.3844.6.camel@laptop.fenrus.com> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Paul Jakma wrote: > > On Thu, 6 May 2004, Arjan van de Ven wrote: > > > Ok I don't want to start a flamewar but... Do we want to hold linux > > back until all binary only module vendors have caught up ?? > > What about normal linux modules though? Eg, NFS (most likely): > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=121804 That's a misdiagnosis. The problem here is that the kernel is taking a pagefault within show_trace(), and the pagefault handler calls show_trace(). It has gone infinitely recursive. The bug is unrelated to the stack size. It is in show_trace() or thereabouts. That code tries to protect itself from recursive faults, but it's a vendor kernel and may be different from the public tree.