Date: Wed, 5 Nov 2003 00:00:40 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: Kris Kennaway <kris@obsecurity.org> Subject: Re: New alpha 5.x bug Message-ID: <20031104230040.GK42463@cicely12.cicely.de> In-Reply-To: <20031104221826.GC15210@freebie.xs4all.nl> References: <20031101103955.GA42891@rot13.obsecurity.org> <20031104031740.GA67484@rot13.obsecurity.org> <20031104124826.GH42463@cicely12.cicely.de> <20031104175552.GA70699@rot13.obsecurity.org> <20031104221251.GJ42463@cicely12.cicely.de> <20031104221826.GC15210@freebie.xs4all.nl>
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On Tue, Nov 04, 2003 at 11:18:26PM +0100, Wilko Bulte wrote: > On Tue, Nov 04, 2003 at 11:12:51PM +0100, Bernd Walter wrote: > > On Tue, Nov 04, 2003 at 09:55:52AM -0800, Kris Kennaway wrote: > > > On Tue, Nov 04, 2003 at 01:48:27PM +0100, Bernd Walter wrote: > > > > I can't speak for this problem yet, because my test systems are a bit > > > > older, but speaking for the pipe corruption: > > > > I did a lots of bzip1, tar, scp, nfs(client) without noticing any > > > > sign of problem. > > > > What is so special with the port cluster? > > > > I have no clue about it's design. > > > > > > It does lots of parallel package builds (untar, pkg_add, compile, tar) and NFS copying. > > > > Any special NFS options? > > tcp, udp, v2, v3, IPv4, IPv6? > > > > Just to get the picture complete. > > The build is local and the package is then copied to a NFS server on > > which t has a corrupted CRC? > > Is the bzip2 CRC wrong, or the tar CRC (does tar have a CRC?), or both? > > Can you say how likely such a corruption is? > > Are other packages compiled during copying a package file to the server? > > Are the building machines memory stressed while creating the bz file or > > while copying it? > > Hmmm.. the package builders are Miatas right? > > Are they using a PCI add-in ethernet card? > > I'm thinking of the Miata's rather fragile DMA stuff in the Pyxis > core logic chip. This is on one of my NFS servers: [53]cicely9# uptime 11:38PM up 73 days, 2:49, 4 users, load averages: 0.03, 0.02, 0.00 [54]cicely9# uname -a FreeBSD cicely9.cicely.de 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Sat Aug 23 03:25:04 CEST 2003 ticso@cicely9.cicely.de:/var/d2/obj/var/d7/builder/FreeBSD-2003-08-22-cicely9/src/sys/CICELY9 alpha The system is a PC164 with a 3COM 3C905B (xl) card and has a lot of NFS load. Isn't the chipset the same as in miatas? One importent difference is that PC164 systems still run with a hack for blocking interupts, which effectively block more interrupts then actually required and therefor massively reduce IO concurency. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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