Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750745AbZFEJBT (ORCPT ); Fri, 5 Jun 2009 05:01:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755362AbZFEJBH (ORCPT ); Fri, 5 Jun 2009 05:01:07 -0400 Received: from acsinet12.oracle.com ([141.146.126.234]:19381 "EHLO acsinet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755349AbZFEJBG (ORCPT ); Fri, 5 Jun 2009 05:01:06 -0400 Message-ID: <4A28DECC.8040804@oracle.com> Date: Fri, 05 Jun 2009 17:01:00 +0800 From: Tao Ma User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Amerigo Wang CC: linux-kernel@vger.kernel.org Subject: Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64 2.6.30-rc8. References: <4A289928.7040508@oracle.com> <20090605054902.GF7962@cr0.nay.redhat.com> <4A28B63E.1080004@oracle.com> <20090605064316.GB8171@cr0.nay.redhat.com> <4A28C1A4.9050708@oracle.com> <20090605080019.GD8171@cr0.nay.redhat.com> In-Reply-To: <20090605080019.GD8171@cr0.nay.redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: abhmt002.oracle.com [141.146.116.11] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A010209.4A28DECF.0261:SCFSTAT5015188,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2134 Lines: 56 Amerigo Wang wrote: > On Fri, Jun 05, 2009 at 02:56:36PM +0800, Tao Ma wrote: >> >> Amerigo Wang wrote: >>> On Fri, Jun 05, 2009 at 02:07:58PM +0800, Tao Ma wrote: >>>> Amerigo Wang wrote: >>>>> On Fri, Jun 05, 2009 at 12:03:52PM +0800, Tao Ma wrote: >>>>>> Hi list, >>>>>> In 2.6.30-rc8, /proc/kcore in x86_64's size is unreasonable >>>>>> large to be 281474974617600. >>>>>> While in a x86 box, it is 931131392 which looks sane. >>>>>> >>>>>> [root@test8 ~]# ll /proc/kcore >>>>>> -r-------- 1 root root 281474974617600 Jun 5 11:15 /proc/kcore >>>>>> >>>>>> [root@ocfs2-test9 ~]$ ll /proc/kcore >>>>>> -r-------- 1 root root 931131392 Jun 5 11:58 /proc/kcore >>>>> Hmm, what is your physical RAM size on test8? >>>>> /proc/kcore looks fine on my x86_64 box. >>>> Only 4G. >>> Hmm, my x86_box has 8G mem, the size of kcore looks much >>> saner than the above huge number, but it is still wrong >>> according to what the man page describes... >>> >>> Please do what Andrew said, it will be helpful. >>> >>>>>> I just noticed this when kexec fails in "Can't find kernel text >>>>>> map area from kcore". >>>>>> >>>>>> Is there something wrong? >>>>> It looks like that error message is from userspace? >>>> I just started kdump and get the error message. >>> IIRC, kdump should use /proc/vmcore, instead of /proc/kcore... >>> nothing related. >> in el5, when start kdump service it will do something like >> /sbin/kexec --args-linux -p '--command-line=ro root=LABEL=/ rhgb quiet >> irqpoll maxcpus=1' --initrd=/boot/initrd-2.6.18-53.el5kdump.img >> /boot/vmlinuz-2.6.18-53.el5 >> >> And the error message is from there. > >>From /sbin/kexec? I just checked the source code of kexec-tools, > I haven't found that message... No, it is there. See kexec-tools-1.101-reloc-update.patch. src rpm is kexec-tools-1.101-194.4.el5.src.rpm. So it is a patch from el5. Regards, Tao -- 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/