From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id 3B2D18D0039 for ; Thu, 17 Feb 2011 04:09:17 -0500 (EST) Date: Thu, 17 Feb 2011 10:09:10 +0100 From: Michal Hocko Subject: Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 Message-ID: <20110217090910.GA3781@tiehlicka.suse.cz> References: <20110216185234.GA11636@tiehlicka.suse.cz> <20110216193700.GA6377@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: Ingo Molnar , linux-mm@kvack.org, LKML On Wed 16-02-11 12:09:35, Linus Torvalds wrote: > On Wed, Feb 16, 2011 at 11:50 AM, Linus Torvalds > wrote: > > > > Yup, goodie. It does look like it might be exactly the same thing, > > except now the offset seems to be 0x1e68 instead of 0x1768. > > It was 0x1748 in Eric's case. Background for Michal: > > http://lkml.org/lkml/2011/2/14/223 I have seen that thread but I didn't think it is related. I thought this is an another anon_vma issue. But you seem to be right that the offset pattern can be related. > > Michal - if you can re-create this, it would be wonderful if you can > enable CONFIG_DEBUG_PAGEALLOC. I didn't find any obvious candidates > yet. OK. I have just booted with the same kernel and the config turned on. Let's see if I am able to reproduce. Btw. $ objdump -d ./vmlinux-2.6.38-rc4-00001-g07409af-vmscan-test | grep 0x1e68 didn't print out anything. Do you have any other way to find out the structure? -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org