From owner-freebsd-hackers Fri Dec 28 14:25: 9 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from niwun.pair.com (niwun.pair.com [209.68.2.70]) by hub.freebsd.org (Postfix) with SMTP id 0D83137B41E for ; Fri, 28 Dec 2001 14:25:05 -0800 (PST) Received: (qmail 3168 invoked by uid 3193); 28 Dec 2001 22:25:04 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 28 Dec 2001 22:25:04 -0000 Date: Fri, 28 Dec 2001 17:25:04 -0500 (EST) From: Mike Silbersack X-Sender: To: Matthew Dillon Cc: =?X-UNKNOWN?Q?S=F8ren_Schmidt?= , "Brandon S. Allbery KF8NH" , ian j hart , Matthew Gilbert , , Subject: Re: 4.4-STABLE crashes - suspects new ata-driver over wd-drivers In-Reply-To: <200112282125.fBSLPeE94616@apollo.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, 28 Dec 2001, Matthew Dillon wrote: > Ok, I have more information on Nils problem. First of all, Soren's > patch greatly reduced the rate of corruption. It took 25 loops of > Nils 'cp' test to generate the corruption. > > However, Soren's patch did not fiix the corruption. The same exact > corruption is occuring. In Nils case it is always the same exact > location in VM -- a certain bit (or byte) in the middle of the nfsnode > hash table. Hardware watch points indicate that the cpu is NOT modifying > this location, so I really doubt that it is a kernel bug. > > From this and from reading a number of other postings about VIA chipsets > I believe that Soren's original patch (which I guess is the official > VIA chipset patch) does not completely solve the VIA chipset's problems. > I also believe, from reading some of the reference material that has > been posted, that this corruption is not limited to the 686[A/B] but > may also occur in earlier VIA chipsets. Agreed, it looks like the "MWQ bug" isn't addressed by soren's patch. The decription at http://www.networking.tzo.com/net/software/readme/faqvl019.htm doesn't give enough info to patch it, but this post to the linux-kernel mailing list seems to shed more light on what needs to be done: http://www.uwsg.iu.edu/hypermail/linux/kernel/0112.0/1421.html Perhaps someone on a faster connection than I can snag a copy of whatever version of linux is current and see the exact patch that went in. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message