Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753605Ab2ECF6V (ORCPT ); Thu, 3 May 2012 01:58:21 -0400 Received: from mail-wi0-f178.google.com ([209.85.212.178]:56088 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752388Ab2ECF6T (ORCPT ); Thu, 3 May 2012 01:58:19 -0400 MIME-Version: 1.0 In-Reply-To: References: <1335788867.29087.19.camel@localhost> <20120501110024.GC6649@dhcp-172-17-9-228.mtv.corp.google.com> <1335875321.26671.15.camel@localhost> From: Linus Torvalds Date: Wed, 2 May 2012 22:57:58 -0700 X-Google-Sender-Auth: qBR0I8qag9wIW4kwns9evfMswpQ Message-ID: Subject: Re: Oops with DCACHE_WORD_ACCESS and ocfs2, autofs4 To: Nick Piggin , "H. Peter Anvin" , Ingo Molnar Cc: Jana Saout , Joel Becker , linux-kernel@vger.kernel.org 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: 876 Lines: 21 Forgot to actually add Peter and Ingo to the cc.. Linus On Wed, May 2, 2012 at 10:57 PM, Linus Torvalds wrote: > > The word-at-a-time code assumes that no allocation will be the last > page (whether kmalloc or normal page allocation), which was always > somewhat optimistic but I thought it would be true on PC's. > > And that %rbp value does *not* look like end-of-memory, but maybe > there is something else than just the CONFIG_DEBUG_PAGEALLOC that > causes us to punch holes even in the kernel memory map. > > Peter, Ingo - do we unmap kernel pages for PAT etc attributes? -- 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/