From owner-freebsd-stable@FreeBSD.ORG Thu Mar 18 11:54:37 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0E20E16A4CE; Thu, 18 Mar 2004 11:54:37 -0800 (PST) Received: from spider.deepcore.dk (cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id CF88A43D2F; Thu, 18 Mar 2004 11:54:35 -0800 (PST) (envelope-from sos@DeepCore.dk) Received: from DeepCore.dk (sos.deepcore.dk [194.192.25.130]) by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id i2IJsHf9034643; Thu, 18 Mar 2004 20:54:32 +0100 (CET) (envelope-from sos@DeepCore.dk) Message-ID: <4059FE69.7050403@DeepCore.dk> Date: Thu, 18 Mar 2004 20:54:17 +0100 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.6b) Gecko/20040126 Thunderbird/0.4 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Doug White References: <40591EC9.B797F608@kuzbass.ru> <20040318101846.E62520@carver.gumbysoft.com> In-Reply-To: <20040318101846.E62520@carver.gumbysoft.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-mail-scanned: by DeepCore Virus & Spam killer v1.4 cc: stable@FreeBSD.ORG cc: Eugene Grosbein cc: bug-followup@FreeBSD.ORG cc: sos@FreeBSD.ORG Subject: Re: kern/60526: Post-PAE stable SMP machine freezes X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Mar 2004 19:54:37 -0000 Doug White wrote: >>According to >>http://freebsd.rambler.ru/bsdmail/freebsd-hackers_2003/msg03936.html >>the problem may be related to the >>and ATA write cache (hw.ata.wc=1). > The problem is with DMA mode on these controllers, not write caching. > Write caching may help to get the data rate up fast enough to trigger the > bug, and turning it off slows things down. > > I HIGHLY recommend using a DIFFERENT controller for disks. The ROSB4 is OK > for CDROMs and the like, but use a different controller for the system > drive. Promise controllers work great. :) Cant disagree with the last sentence, however my only i386 SMP machine has exactly the ROSB4 chip in it, and I use that for disks etc, newer had a problem with it, but again this is an ASUS board and they supposedly fixed the problem in HW (the *only* way to fix it btw). > ATA tagging is known to work with only a few disk models. You should > enable ATA tags ONLY if you KNOW your drive supports it, and test > extensively to ensure stability. To be more exact, only a very few disks supports tags, in fact I only know of IBM and a select few WDC disks that actually anounces support for tags. The ATA driver (in -stable) only tries to enable tags if the HW says it supports it and its a known to work drive. However the PAE import has broken tags support so it doesn't work on any disks :( -- -Søren