From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752159AbdFNTbL (ORCPT ); Wed, 14 Jun 2017 15:31:11 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:54374 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752004AbdFNTbK (ORCPT ); Wed, 14 Jun 2017 15:31:10 -0400 Date: Wed, 14 Jun 2017 15:31:08 -0400 (EDT) Message-Id: <20170614.153108.433249474812834884.davem@davemloft.net> To: linux@roeck-us.net Cc: pasha.tatashin@oracle.com, linux-kernel@vger.kernel.org, bob.picco@oracle.com, steven.sistare@oracle.com Subject: Re: qemu sparc64 runtime crashes in -next From: David Miller In-Reply-To: <157ed65a-b676-960c-5293-5964b7110f90@roeck-us.net> References: <157ed65a-b676-960c-5293-5964b7110f90@roeck-us.net> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 14 Jun 2017 11:49:28 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guenter Roeck Date: Wed, 14 Jun 2017 03:13:54 -0700 > Hi, > > my sparc qemu tests started failing with next-20170613. > Log output is not very helpful: > > Unhandled Exception 0x0000000000000028 > PC = 0x00000000004620f4 NPC = 0x00000000004620f8 > Stopping execution > > It looks like 0x00000000004620f4 is in init_tick_ops(). > > Bisect points to commit 'sparc64: improve modularity tick options'. > Bisect log is attached. > > No idea if this is a qemu problem. If you think it is, anything to > help > tracking it down would be appreciated. Pavel, please look into this. It looks weird that the commit it bisects to would cause a problem. Maybe the change from __read_mostly to __cachelin_aligned causes the issue? Really weird...