Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933502AbXFEW6S (ORCPT ); Tue, 5 Jun 2007 18:58:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764975AbXFEW6G (ORCPT ); Tue, 5 Jun 2007 18:58:06 -0400 Received: from terminus.zytor.com ([192.83.249.54]:49496 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764864AbXFEW6D (ORCPT ); Tue, 5 Jun 2007 18:58:03 -0400 Message-ID: <4665EA4F.2090004@zytor.com> Date: Tue, 05 Jun 2007 15:57:19 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Andy Whitcroft CC: Mel Gorman , Andrew Morton , Linux Kernel Mailing List , Steve Fox Subject: Re: 2.6.22-rc1-mm1 References: <20070515201914.16944e04.akpm@linux-foundation.org> <464ADA5D.8050405@shadowen.org> <464B2048.7040103@zytor.com> <20070516174046.GE10225@skynet.ie> <464B9573.8030407@zytor.com> <465CAA86.5020402@shadowen.org> <465FEBD3.7020801@shadowen.org> <4660A7E0.6070600@zytor.com> <4665AD8B.80506@shadowen.org> In-Reply-To: <4665AD8B.80506@shadowen.org> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1228 Lines: 32 Andy Whitcroft wrote: >>> >> It definitely sounds like a memory clobber of some sort. >> >> Usual suspects, in addition to the input/output buffers you already >> looked at, would be the heap and the stack. Finding where the stack >> pointer lives would be my first, instinctive guess. > > The stack seems to be where it should be and seems to stay pretty much > in the same place as it should. Adding checks for the heap also seem to > stay within bounds. I've tried making the stack and the heap 64k to no > effect. > > Moving the kernel to other places in memory seems to kill the decode > completely during gunzip() which may be a hint I am not sure. > > This thing is trying to ruin my mind. > Yours and mine both. Seems like *something* is clobbering memory, but what and why is a mystery. The fact that putting the kernel in a higher point in memory is a good indication that this clobber is at a relatively high address. How much RAM does this machine have? -hpa - 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/