From owner-freebsd-ppc Mon Aug 5 7: 5: 8 2002 Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CE2A237B400 for ; Mon, 5 Aug 2002 07:05:05 -0700 (PDT) Received: from gt3.OntheNet.com.au (nt.com.au [203.13.70.61]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8EA2E43E70 for ; Mon, 5 Aug 2002 07:05:04 -0700 (PDT) (envelope-from peterg@ptree32.com.au) Received: from ptree32.com.au (CPE-203-45-246-228.qld.bigpond.net.au [203.45.246.228]) by gt3.OntheNet.com.au (8.11.4/8.11.4) with ESMTP id g75E6sg01716; Tue, 6 Aug 2002 00:06:54 +1000 (EST) Message-ID: <3D4E8ABB.86EF8A6B@ptree32.com.au> Date: Tue, 06 Aug 2002 00:24:59 +1000 From: Peter Grehan Organization: Ptree32 Pty Ltd X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.2.14-12 i686) X-Accept-Language: en MIME-Version: 1.0 To: Andrew Gallatin Cc: freebsd-ppc@FreeBSD.ORG Subject: Re: Single-user References: <3D4CF994.7478E7D0@ptree32.com.au> <20020804150712.GA81125@electricjellyfish.net> <3D4DAE9C.FA1B05C9@ptree32.com.au> <15694.33407.146642.70257@grasshopper.cs.duke.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-ppc@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi Andrew, > This looks really odd to me .. I'm used to seeing races where you get > entire pages of nulls, not just 239 of them. Could this be a cache > related problem? Do you see this behaviour on your test machine? Yes, I'm looking into it :-( It's easy to reproduce - any small text shows similar behaviour. It doesn't show up when reading from the CDROM, so the problem is buried somewhere in the NFS/net code path. > This is probably unrelated, but the machine will lock solid under > heavy io (dd'ing 100MB file over NFS to /dev/null). I'll look into that one too. > I can also panic it by doing 'sysctl -a' on the console: ... > hw.pci.enable_io_modes: 1 > panic: kmem I can reproduce this in the simulator, so it should be an easy fix :-) later, Peter. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-ppc" in the body of the message