Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753450AbXIPRPn (ORCPT ); Sun, 16 Sep 2007 13:15:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751551AbXIPRPe (ORCPT ); Sun, 16 Sep 2007 13:15:34 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:38746 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751528AbXIPRPd (ORCPT ); Sun, 16 Sep 2007 13:15:33 -0400 Date: Sun, 16 Sep 2007 10:14:46 -0700 (PDT) From: Linus Torvalds To: Randy Dunlap cc: Andi Kleen , lkml , Andi Kleen Subject: Re: crashme fault In-Reply-To: <20070916094001.d87ed0f0.randy.dunlap@oracle.com> Message-ID: References: <20070912222151.70d1fc7d.randy.dunlap@oracle.com> <20070915183412.GA14501@one.firstfloor.org> <46EC2702.3090000@oracle.com> <46EC6F2A.5090008@oracle.com> <20070916094001.d87ed0f0.randy.dunlap@oracle.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1161 Lines: 32 On Sun, 16 Sep 2007, Randy Dunlap wrote: > > I'll apply this patch today, but I haven't done so yet (for the 2 > bug reports below). Actually, it's probably better that you don't change your situation unnecessarily, in case the bug goes away. Since you are triggering the problem even *without* the patch, whatever crashme is doing now for you is the interesting case. I suspect NX just isn't active for you, so the mprotect doesn't matter, but if it *does* matter, that's interesting in itself. > Then I'll back up more, prior to 2.6.22 (which got the Huh? message and > kept going). Ahh, ok, so this is not a new thing, and it happened in 2.6.22 too. I'm really starting to suspect some early EM64T bug, and I also suspect that it's harmless but that we should just do the trivial patch to say "if the register state is in user mode, we don't care if the CPU says it was a kernel access". 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/