From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755498Ab2FNJtf (ORCPT ); Thu, 14 Jun 2012 05:49:35 -0400 Received: from mail-ob0-f174.google.com ([209.85.214.174]:60295 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755115Ab2FNJte (ORCPT ); Thu, 14 Jun 2012 05:49:34 -0400 Message-ID: <1339667440.3321.7.camel@lappy> Subject: Re: Early boot panic on machine with lots of memory From: Sasha Levin To: Tejun Heo Cc: Andrew Morton , David Miller , hpa@linux.intel.com, linux-mm , "linux-kernel@vger.kernel.org" Date: Thu, 14 Jun 2012 11:50:40 +0200 In-Reply-To: <20120614032005.GC3766@dhcp-172-17-108-109.mtv.corp.google.com> References: <1339623535.3321.4.camel@lappy> <20120614032005.GC3766@dhcp-172-17-108-109.mtv.corp.google.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2012-06-14 at 12:20 +0900, Tejun Heo wrote: > On Wed, Jun 13, 2012 at 11:38:55PM +0200, Sasha Levin wrote: > > Hi all, > > > > I'm seeing the following when booting a KVM guest with 65gb of RAM, on latest linux-next. > > > > Note that it happens with numa=off. > > > > [ 0.000000] BUG: unable to handle kernel paging request at ffff88102febd948 > > [ 0.000000] IP: [] __next_free_mem_range+0x9b/0x155 > > Can you map it back to the source line please? mm/memblock.c:583 phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; 97: 85 d2 test %edx,%edx 99: 74 08 je a3 <__next_free_mem_range+0xa3> 9b: 49 8b 48 f0 mov -0x10(%r8),%rcx 9f: 49 03 48 e8 add -0x18(%r8),%rcx It's the deref on 9b (r8=ffff88102febd958). From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx154.postini.com [74.125.245.154]) by kanga.kvack.org (Postfix) with SMTP id 4C9DB6B005C for ; Thu, 14 Jun 2012 05:49:34 -0400 (EDT) Received: by obbta14 with SMTP id ta14so1981016obb.14 for ; Thu, 14 Jun 2012 02:49:33 -0700 (PDT) Message-ID: <1339667440.3321.7.camel@lappy> Subject: Re: Early boot panic on machine with lots of memory From: Sasha Levin Date: Thu, 14 Jun 2012 11:50:40 +0200 In-Reply-To: <20120614032005.GC3766@dhcp-172-17-108-109.mtv.corp.google.com> References: <1339623535.3321.4.camel@lappy> <20120614032005.GC3766@dhcp-172-17-108-109.mtv.corp.google.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Tejun Heo Cc: Andrew Morton , David Miller , hpa@linux.intel.com, linux-mm , "linux-kernel@vger.kernel.org" On Thu, 2012-06-14 at 12:20 +0900, Tejun Heo wrote: > On Wed, Jun 13, 2012 at 11:38:55PM +0200, Sasha Levin wrote: > > Hi all, > > > > I'm seeing the following when booting a KVM guest with 65gb of RAM, on latest linux-next. > > > > Note that it happens with numa=off. > > > > [ 0.000000] BUG: unable to handle kernel paging request at ffff88102febd948 > > [ 0.000000] IP: [] __next_free_mem_range+0x9b/0x155 > > Can you map it back to the source line please? mm/memblock.c:583 phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; 97: 85 d2 test %edx,%edx 99: 74 08 je a3 <__next_free_mem_range+0xa3> 9b: 49 8b 48 f0 mov -0x10(%r8),%rcx 9f: 49 03 48 e8 add -0x18(%r8),%rcx It's the deref on 9b (r8=ffff88102febd958). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org