Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754601Ab1BPUwP (ORCPT ); Wed, 16 Feb 2011 15:52:15 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:56878 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754388Ab1BPUwM (ORCPT ); Wed, 16 Feb 2011 15:52:12 -0500 MIME-Version: 1.0 In-Reply-To: References: <20110216185234.GA11636@tiehlicka.suse.cz> <20110216193700.GA6377@elte.hu> From: Linus Torvalds Date: Wed, 16 Feb 2011 12:51:21 -0800 Message-ID: Subject: Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 To: Ingo Molnar Cc: Michal Hocko , linux-mm@kvack.org, LKML Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 959 Lines: 23 On Wed, Feb 16, 2011 at 12:09 PM, Linus Torvalds wrote: > > That said, neither 0x1e68 nor 0xe68 seems to be in the main vmlinux > file. But I haven't checked modules yet. There's no obvious clues in modules either. Sad. I was really hoping for some "oh, there's a list_head at offset 0x1e68 of structure 'xyz', that's obviously it". So maybe it really is something like a pointer to some on-stack data, and the 0x1e68 offset is just a random offset off the beginning of the stack (it's in the right range). The stack is still one of the few obvious 8kB allocations we have... CONFIG_DEBUG_PAGEALLOC really should catch it in that case, though. Linus -- 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/