From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262279AbUERB5F (ORCPT ); Mon, 17 May 2004 21:57:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262356AbUERB5F (ORCPT ); Mon, 17 May 2004 21:57:05 -0400 Received: from taco.zianet.com ([216.234.192.159]:54795 "HELO taco.zianet.com") by vger.kernel.org with SMTP id S262279AbUERB5B (ORCPT ); Mon, 17 May 2004 21:57:01 -0400 From: Steven Cole To: Andrew Morton Subject: Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.) Date: Mon, 17 May 2004 19:56:28 -0600 User-Agent: KMail/1.6.1 Cc: Larry McVoy , mason@suse.com, torvalds@osdl.org, wli@holomorphy.com, hugh@veritas.com, adi@bitmover.com, support@bitmover.com, linux-kernel@vger.kernel.org References: <200405132232.01484.elenstev@mesatop.com> <20040518013439.GA23497@work.bitmover.com> <20040517184208.2206e8c4.akpm@osdl.org> In-Reply-To: <20040517184208.2206e8c4.akpm@osdl.org> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200405171956.28747.elenstev@mesatop.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 17 May 2004 07:42 pm, Andrew Morton wrote: > Larry McVoy wrote: > > > > > I'd really like to see this happen on some other machine though. It'd be > > > funny if you have a dud disk drive or something. > > > > We can easily rule that out. Steven, do a > > > > dd if=/dev/zero of=USE_SOME_SPACE bs=1048576 count=500 I'll get to Larry's test a little later. Pizza's about to come out of the oven. > > > > which will eat up 500 MB and should eat up any bad blocks. I _really_ > > doubt it is a bad disk. > > Yes, me too. The sensitivity to CONFIG_PREEMPT makes that unlikely. > > Two things I'm not clear on: > > a) Has is been established that CONFIG_PREEMPT causes ppp to fail? At the risk of a "post hoc ergo propter hoc" fallacy, I'd say yes. I have not seen ppp fail without PREEMPT. No PREEMPT, no ppp problems. > > b) Has the file corruption been observed when PPP was not in use at all? No, at least I don't have any specific memory of corruption without ppp. I made a fresh 3.9G reiserfs fs on my second disk, and cloned a kernel tree to it. I can use it for testing, but its currently in sync with linux.bkbits.net/linux-2.5. Later, Steven