From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751956Ab1FPGRE (ORCPT ); Thu, 16 Jun 2011 02:17:04 -0400 Received: from gate.crashing.org ([63.228.1.57]:49184 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750814Ab1FPGRB (ORCPT ); Thu, 16 Jun 2011 02:17:01 -0400 Subject: Re: Oops in VMA code From: Benjamin Herrenschmidt To: Alexander Graf Cc: Linus Torvalds , linux-mm@kvack.org, "linux-kernel@vger.kernel.org List" In-Reply-To: <1308204171.2516.65.camel@pasglop> References: <47FAB15C-B113-40FD-9CE0-49566AACC0DF@suse.de> <1308204171.2516.65.camel@pasglop> Content-Type: text/plain; charset="UTF-8" Date: Thu, 16 Jun 2011 16:16:51 +1000 Message-ID: <1308205011.2516.66.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2011-06-16 at 16:02 +1000, Benjamin Herrenschmidt wrote: > On Thu, 2011-06-16 at 07:32 +0200, Alexander Graf wrote: > > On 16.06.2011, at 06:32, Linus Torvalds wrote: > > > Thanks a lot for looking at it either way :). > > Yeah thanks ;-) Let me see what I can dig out. > > First it's a load from what looks like a valid pointer to the linear > mapping that had one byte corrupted (or more but it looks reasonably > "clean"). It's not a one bit error, there's at least 2 bad bits (the > 09): > > DAR: c00090026236bbc0 > > Alex, how much RAM do you have ? If that was just a one byte corruption, > the above would imply you have something valid between 9 and 10G. From > the look of other registers, it seems that it could be a genuine pointer > with just that stay "09" byte that landed onto it. 90 actually... Anyways, doesn't tell us much more. Ben.