Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752930AbdHVTMZ (ORCPT ); Tue, 22 Aug 2017 15:12:25 -0400 Received: from ozlabs.org ([103.22.144.67]:53551 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751744AbdHVTMW (ORCPT ); Tue, 22 Aug 2017 15:12:22 -0400 Date: Wed, 23 Aug 2017 05:12:16 +1000 From: Stephen Rothwell To: "Paul E. McKenney" Cc: Linux-Next Mailing List , Linux Kernel Mailing List , ppc-dev , Nicholas Piggin Subject: Re: linux-next: Tree for Aug 22 Message-ID: <20170823051216.34f2c09f@canb.auug.org.au> In-Reply-To: <20170822185923.GE11320@linux.vnet.ibm.com> References: <20170822183816.7925e0f8@canb.auug.org.au> <20170823041117.780097f7@canb.auug.org.au> <20170823041424.1dddeb2d@canb.auug.org.au> <20170822185923.GE11320@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1004 Lines: 32 Hi Paul, On Tue, 22 Aug 2017 11:59:23 -0700 "Paul E. McKenney" wrote: > > On Wed, Aug 23, 2017 at 04:14:24AM +1000, Stephen Rothwell wrote: > > Hi all, > > > > On Wed, 23 Aug 2017 04:11:17 +1000 Stephen Rothwell wrote: > > > > > > This tree fails to boot on my qemu test. 2 boot logs attached. > > > > > > Paul, Nick, is this the same/similar to the other RCU/lockup bug you > > > are chasing. This is the first time I have seen this failure. > > > > > > This qemu boot is in full emulation mode if I add --enable-kvm to the > > > qemu command, it does not fail to boot. (the test just boots and then shuts down) > > > > Boot logs attached this time. > > That does not look good! > > Given that the hard lockup happened during timer lock acquisition, I > have to ask if you built with lockdep... $ grep LOCKDEP .config CONFIG_LOCKDEP_SUPPORT=y so, no. This is just a powerpc pseries_le_defconfig build. -- Cheers, Stephen Rothwell