Date: Fri, 28 Dec 2001 17:25:04 -0500 (EST) From: Mike Silbersack <silby@silby.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: =?X-UNKNOWN?Q?S=F8ren_Schmidt?= <sos@freebsd.dk>, "Brandon S. Allbery KF8NH" <allbery@ece.cmu.edu>, ian j hart <ianjhart@ntlworld.com>, Matthew Gilbert <agilbertm@earthlink.net>, <freebsd-stable@FreeBSD.ORG>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: 4.4-STABLE crashes - suspects new ata-driver over wd-drivers Message-ID: <Pine.BSF.4.30.0112281722270.92969-100000@niwun.pair.com> In-Reply-To: <200112282125.fBSLPeE94616@apollo.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.30.0112281722270.92969-100000>