From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756707AbYKEAOZ (ORCPT ); Tue, 4 Nov 2008 19:14:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751871AbYKEAOQ (ORCPT ); Tue, 4 Nov 2008 19:14:16 -0500 Received: from rv-out-0506.google.com ([209.85.198.228]:45240 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751565AbYKEAOP (ORCPT ); Tue, 4 Nov 2008 19:14:15 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=Xadj7vEflaNr2rv9Y7JO+/TxAe1TGDI1r0n370zHXu9lyAlMHupBqjlmfks0pzIRW0 DCuoklobbeduLqi/0wAO9J9Y8wZfQGIxUOI/QrRUbHgwn8vO3gau/jNx49tVwdD/I+PF BrKtGNAg7hBCU+URyhAWjTekwWQBN4Z2TSLQw= Message-ID: <86802c440811041614i5ab5e7f5hf910211ef57423e7@mail.gmail.com> Date: Tue, 4 Nov 2008 16:14:14 -0800 From: "Yinghai Lu" To: "Theodore Tso" , linux-kernel@vger.kernel.org, "Thomas Gleixner" Subject: Re: 2.6.28-rc2: REGRESSION in early boot In-Reply-To: <20081104224510.GA7672@mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20081104224510.GA7672@mit.edu> X-Google-Sender-Auth: da12f019dc6cf386 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 4, 2008 at 2:45 PM, Theodore Tso wrote: > I've opened a Kernel Bug to track this regression: > > http://bugzilla.kernel.org/show_bug.cgi?id=11951 > > My fileserver boots under 2.6.27, but it is failing to boot on > 2.6.28-rc2. It took me a while to bisect, so after I finished the > bisection, I retested with the latest mainline > (v2.6.28-rc3-54-g75fa677), and the problem still shows up. > > Essentially, the system panics in early boot, resulting in multiple > oops. I finally was able get the very first oops, and the image of > that oops can be found here: > > http://thunk.org/tytso/2.6.27-regress/92b29b8/IMG_0331.JPG > > From the console snapshot, it looks like two CPU simultaneously > OOPS'ed with a: > > BUG: unable to handle kernel NULL dereference at 00000000 > BUG: unable to handle kernel NULL dereference at 00000038 > > On the stack is "scheduler_tick+0x83/0x15f" > > When doing a bisection, the last good commit (i.e., the last one which > I can boot on my system) is git id: d6c88a50 (which preceeds 2.6.28-rc1). > > The first bad git ID is: > > commit d6c88a507ef0b6afdb013cba4e7804ba7324d99a > Author: Thomas Gleixner > Date: Wed Oct 15 15:27:23 2008 +0200 > > genirq: revert dynarray > > Revert the dynarray changes. They need more thought and polishing. > > Signed-off-by: Thomas Gleixner > > ... but in fact, the failure is different from the above messages. > The failure is also in early boot, but the oops message is quite > different: please check http://lkml.org/lkml/2008/11/4/431 YH