From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030804AbWLGFjJ (ORCPT ); Thu, 7 Dec 2006 00:39:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030736AbWLGFjJ (ORCPT ); Thu, 7 Dec 2006 00:39:09 -0500 Received: from 1wt.eu ([62.212.114.60]:1414 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030804AbWLGFjI (ORCPT ); Thu, 7 Dec 2006 00:39:08 -0500 Date: Thu, 7 Dec 2006 06:39:01 +0100 From: Willy Tarreau To: Jesper Juhl Cc: Linux Kernel Mailing List Subject: Re: vmscan.c:196: bad pmd (kernel 2.4.25) Message-ID: <20061207053900.GC24090@1wt.eu> References: <9a8748490612060022i25fc2617ya90e48c2e3c719d1@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9a8748490612060022i25fc2617ya90e48c2e3c719d1@mail.gmail.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Wed, Dec 06, 2006 at 09:22:29AM +0100, Jesper Juhl wrote: > The following messages just showed up in dmesg on one of my servers. > The server seems to be running fine but I would like to know if > there's a real problem here or if the message is just noise. > > The server is running 2.4.25 > > vmscan.c:196: bad pmd 000001e3. > vmscan.c:196: bad pmd 004001e3. ... > vmscan.c:196: bad pmd 378001e3. > vmscan.c:196: bad pmd 37c001e3. I may be wrong, but to me it looks either like memory corruption affecting one pgd, and by extension all of its pmds, or an old bug in 2.4.25, but I don't recall seeing such a thing. Anyway, I would personally reboot the server after such a thing, as I really don't like it when VM is going mad. Regards, Willy