From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262766AbUEGDp0 (ORCPT ); Thu, 6 May 2004 23:45:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262882AbUEGDp0 (ORCPT ); Thu, 6 May 2004 23:45:26 -0400 Received: from hibernia.jakma.org ([212.17.55.49]:911 "EHLO hibernia.jakma.org") by vger.kernel.org with ESMTP id S262766AbUEGDpZ (ORCPT ); Thu, 6 May 2004 23:45:25 -0400 Date: Fri, 7 May 2004 04:44:16 +0100 (IST) From: Paul Jakma X-X-Sender: paul@fogarty.jakma.org To: Andrew Morton cc: arjanv@redhat.com, Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org Subject: Re: 2.6.6-rc3-mm2 (4KSTACK) In-Reply-To: <20040506195002.520b0793.akpm@osdl.org> Message-ID: 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> <20040506195002.520b0793.akpm@osdl.org> X-NSA: arafat al aqsar jihad musharef jet-A1 avgas ammonium qran inshallah allah al-akbar martyr iraq saddam hammas hisballah rabin ayatollah korea vietnam revolt mustard gas british airways washington MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 6 May 2004, Andrew Morton wrote: > 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. That happens after the initial stack overflow with a trace (from what i could discern before it scrolled into oblivion) in NFS -> IP path similar to the other non-recursive trace, see below. > 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. Fair enough but have a look at the other fault from that bug though: https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=99855&action=view That one did not recurse for some reason. regards, -- Paul Jakma paul@clubi.ie paul@jakma.org Key ID: 64A2FF6A warning: do not ever send email to spam@dishone.st Fortune: The program isn't debugged until the last user is dead.