Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751645AbaJBDce (ORCPT ); Wed, 1 Oct 2014 23:32:34 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:18016 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750868AbaJBDcd (ORCPT ); Wed, 1 Oct 2014 23:32:33 -0400 Message-ID: <542CC73F.8050907@oracle.com> Date: Wed, 01 Oct 2014 23:32:15 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Chuck Ebbert CC: Linus Torvalds , Hugh Dickins , Dave Jones , Al Viro , Linux Kernel , Rik van Riel , Ingo Molnar , Michel Lespinasse , "Kirill A. Shutemov" , Mel Gorman Subject: Re: pipe/page fault oddness. References: <20140930033327.GA14558@redhat.com> <20140930043309.GA16196@redhat.com> <20140930160510.GA15903@redhat.com> <20140930162201.GC15903@redhat.com> <20140930164047.GA18354@redhat.com> <20140930182059.GA24431@redhat.com> <542C7B5E.2020000@oracle.com> <20141001172804.16e5986a@as> In-Reply-To: <20141001172804.16e5986a@as> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/01/2014 06:28 PM, Chuck Ebbert wrote: > On Wed, 01 Oct 2014 18:08:30 -0400 > Sasha Levin wrote: > >> > On 10/01/2014 04:20 PM, Linus Torvalds wrote: >>> > > So I'm really sending this patch out in the hope that it will get >>> > > comments, fixup and possibly even testing by people who actually know >>> > > the NUMA balancing code. Rik? Anybody? >> > >> > Hi Linus, >> > >> > I've tried this patch on the same configuration that was triggering >> > the VM_BUG_ON that Hugh mentioned previously. Surprisingly enough it >> > ran fine for ~20 minutes before exploding with: >> > >> > [ 2781.566206] kernel BUG at mm/huge_memory.c:1293! > That's: > BUG_ON(is_huge_zero_page(page)); > > Can you change your scripts to show the source code line when > the error is a BUG_ON()? The machine code disassembly after the > oops message doesn't really help. > Hum? The source code line is the first line in the trace: [ 2781.566206] kernel BUG at mm/huge_memory.c:1293! Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/