From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754556Ab0JRJFY (ORCPT ); Mon, 18 Oct 2010 05:05:24 -0400 Received: from mailout-de.gmx.net ([213.165.64.23]:33639 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1752925Ab0JRJFX convert rfc822-to-8bit (ORCPT ); Mon, 18 Oct 2010 05:05:23 -0400 X-Authenticated: #5108953 X-Provags-ID: V01U2FsdGVkX1+qyUArWSWqwQpGg4IWusW6KnkEVDn9Rv20qZ6xT6 IONXTFXkOlA8O4 From: Toralf =?iso-8859-1?q?F=F6rster?= To: Christoph Hellwig Subject: Re: Fwd: Re: UML kernel crash of v2.6.36-rcX kernel Date: Mon, 18 Oct 2010 11:05:16 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.35.6; KDE/4.4.5; i686; ; ) Cc: user-mode-linux-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Richard Weinberger , Al Viro References: <201010131328.06465.toralf.foerster@gmx.de> <201010171555.40453.toralf.foerster@gmx.de> <20101017201837.GA16458@lst.de> In-Reply-To: <20101017201837.GA16458@lst.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Message-Id: <201010181105.17077.toralf.foerster@gmx.de> X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Well, in addition to my last mail the following patch isn't a fix, but it might point to the culprit. If I apply this patch against latest tree, then the crash doesn't occur : diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 0166d32..e336e70 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -15,8 +15,8 @@ struct kstatfs { __kernel_fsid_t f_fsid; long f_namelen; long f_frsize; - long f_flags; long f_spare[4]; + long f_flags; }; Christoph Hellwig wrote at 22:18:37 > On Sun, Oct 17, 2010 at 03:55:39PM +0200, Toralf F?rster wrote: > > I bisected it again w/ a fixed test script, got the same bad commit > > script and double checked, that this commit is really the culprit which > > crashes a user mode linux kernel at my 32bix x86 stable Gentoo running > > 2.6.35.6 vanilla kernel as host system and 2/ gcc version 4.4.3 (Gentoo > > 4.4.3-r2 p1.2) and glibc-2.11.2-r1 in the tool chain. > > I really can't see any relation to the patch. Can you try the some > things in the following order, please: > > (1) git-revert 365b18189789bfa1acd9939e6312b8a4b4577b28 on current > Linus tree and see it it works. > If it works try the next, else the bisect must have been a weird > conicidence and I can't really help more. > (2) re-apply only the changes to include/asm-generic/statfs.h from > 365b18189789bfa1acd9939e6312b8a4b4577b28 and see if that still > boots. > (3) re-apply the arch/mips/include/asm/statfs.h and > arch/s390/include/asm/statfs.h changes and see if it still boots > (4) re-apply the include/linux/statfs.h changes and see if it still > boots > (5) re-apply the fs/statfs.c changes, and by now it really shouldn't > boot anymore > (6) verify the code really is the same again as in current Linus' tree -- MfG/Kind regards Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3