From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx193.postini.com [74.125.245.193]) by kanga.kvack.org (Postfix) with SMTP id 1CE736B0069 for ; Thu, 14 Jun 2012 16:56:10 -0400 (EDT) Received: by dakp5 with SMTP id p5so3750758dak.14 for ; Thu, 14 Jun 2012 13:56:09 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <1339667440.3321.7.camel@lappy> References: <1339623535.3321.4.camel@lappy> <20120614032005.GC3766@dhcp-172-17-108-109.mtv.corp.google.com> <1339667440.3321.7.camel@lappy> Date: Thu, 14 Jun 2012 13:56:09 -0700 Message-ID: Subject: Re: Early boot panic on machine with lots of memory From: Yinghai Lu Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: Tejun Heo , Andrew Morton , David Miller , hpa@linux.intel.com, linux-mm , "linux-kernel@vger.kernel.org" On Thu, Jun 14, 2012 at 2:50 AM, Sasha Levin wrot= e: > 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=3Doff. >> > >> > [ =A0 =A00.000000] BUG: unable to handle kernel paging request at ffff= 88102febd948 >> > [ =A0 =A00.000000] IP: [] __next_free_mem_range+0x9b= /0x155 >> >> Can you map it back to the source line please? > > mm/memblock.c:583 > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0phys_addr_t r_start =3D ri= ? r[-1].base + r[-1].size : 0; > =A097: =A0 85 d2 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 test =A0 %edx,%edx > =A099: =A0 74 08 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 je =A0 =A0 a3 <__nex= t_free_mem_range+0xa3> > =A09b: =A0 49 8b 48 f0 =A0 =A0 =A0 =A0 =A0 =A0 mov =A0 =A0-0x10(%r8),%rcx > =A09f: =A0 49 03 48 e8 =A0 =A0 =A0 =A0 =A0 =A0 add =A0 =A0-0x18(%r8),%rcx > > It's the deref on 9b (r8=3Dffff88102febd958). that reserved.region is allocated by memblock. can you boot with "memblock=3Ddebug debug ignore_loglevel" and post whole boot log? Thanks Yinghai -- 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