Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751927AbZFIEKX (ORCPT ); Tue, 9 Jun 2009 00:10:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750781AbZFIEKN (ORCPT ); Tue, 9 Jun 2009 00:10:13 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:39035 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750851AbZFIEKM convert rfc822-to-8bit (ORCPT ); Tue, 9 Jun 2009 00:10:12 -0400 To: =?utf-8?Q?Am=C3=A9rico?= Wang Cc: Tao Ma , Andrew Morton , linux-kernel@vger.kernel.org, Alexey Dobriyan References: <20090605075614.GC8171@cr0.nay.redhat.com> <20090605095155.GC8354@cr0.nay.redhat.com> <4A292B0D.8030807@oracle.com> <4A295AFB.80909@kernel.org> <4A2A7F33.4030807@oracle.com> <4A2AEBE3.4000100@kernel.org> <20090608015242.GB2596@cr0.nay.redhat.com> <4A2CA96D.3090502@oracle.com> <2375c9f90906072341o2cded749m45bdddfdb499469@mail.gmail.com> <4A2CC52B.9010602@oracle.com> <2375c9f90906081743p77934f47n8ba1a018d333b95b@mail.gmail.com> From: ebiederm@xmission.com (Eric W. Biederman) Date: Mon, 08 Jun 2009 21:10:10 -0700 In-Reply-To: <2375c9f90906081743p77934f47n8ba1a018d333b95b@mail.gmail.com> (=?utf-8?Q?=22Am=C3=A9rico?= Wang"'s message of "Tue\, 9 Jun 2009 08\:43\:34 +0800") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-XM-SPF: eid=;;;mid=;;;hst=in01.mta.xmission.com;;;ip=76.21.114.89;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 76.21.114.89 X-SA-Exim-Rcpt-To: xiyou.wangcong@gmail.com, adobriyan@gmail.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, tao.ma@oracle.com X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa02 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: =?ISO-8859-1?Q?;Am=c3=a9rico Wang ?= X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 1.5 TR_Symld_Words too many words that have symbols inside * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa02 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject * 0.0 T_TooManySym_03 6+ unique symbols in subject * 0.0 XM_SPF_Neutral SPF-Neutral * 0.0 T_TooManySym_02 5+ unique symbols in subject * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay Subject: Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64 2.6.30-rc8. X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1338 Lines: 42 Américo Wang writes: > On Mon, Jun 8, 2009 at 4:00 PM, Tao Ma wrote: >>>> >>>> But the result is the same >>> >>> Yes? >>> Your printk() shows kcore size is: 5301604352, and in your subject it is >>> 281474974617600... >>> >>> Or they happened in the same time? >> >> yes. the same box and the same linux version. >> A bit strange. >> >> [taoma@ocfs2-test2 ~]$ dmesg|grep "high memory" >> high memory ffff88013c000000, size 5301604352 >> [taoma@ocfs2-test2 ~]$ ll /proc/kcore >> -r-------- 1 root root 281474974617600 Jun  8 15:20 /proc/kcore > > Really weird... > They should be the same. This means we have some problem in our procfs. > > And, we have no problem on i386, I, myself, even can't reproduce this on my > x86_64 box... > > Drop Cc to x86 people, add some Cc to proc people. :) > > Eric, Alexey, any ideas? > > Tao, would you like to send us your .config? Thanks. Short of some strange patch applied I would guess that a non-sense /proc/kcore size is related to a kernel memory stomp, stepping on the high_memory variable. Eric -- 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/