From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Gaffney Date: Wed, 21 Mar 2007 13:49:14 +0000 Subject: Re: [Repost] Ultra2 SMP freezes with heavy disk I/O Message-Id: <460137DA.8030808@gentoo.org> List-Id: References: <20070320180102.GA27466@rayleigh.systella.fr> In-Reply-To: <20070320180102.GA27466@rayleigh.systella.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: sparclinux@vger.kernel.org Chini, Georg wrote: >=20 >=20 > Ferris McCormick wrote: >=20 >> On Wed, 2007-03-21 at 10:53 +0100, bertrand wrote: >> =20 >> >>> Ferris McCormick a =C3=A9crit : >>> =20 >>>> -----BEGIN PGP SIGNED MESSAGE----- >>>> Hash: SHA1 >>>> >>>> =20 >> >> --- snip --- >> >> =20 >> >>>>> JKB >>>>> =20 >>>> This is a problem with U2+kernel-2.6.x generally. Unfortunately, I >>>> have no suggestions nor do I have a solution. I just grit my teeth and >>>> stay with the kernel-2.4.x series, which are completely stable on U2, >>>> so far as I can tell. >>>> =20 >>> What is your U2 configuration ? I have only one U2 and I cannot=20 >>> test on this station because it's a mail server :-( In fact, I think=20 >>> it should be interesting to know if this trouble come from SMP, ESP=20 >>> or Sbus support. It is impossible to build a kernel with debug=20 >>> information (it does not boot due to a address not aligned...), but I=20 >>> have tested the same kernel on a U1E (with the same ESP chip and two=20 >>> additional HappyMeal Ethernet cards on Sbus slots). It perfectly=20 >>> works. Can you try a 2.6 on U2 without SMP support ? >>> >>> Regards, >>> >>> JKB >>> =20 >> >> I have 2 U2's; U2(2x300), U2(2x400). The SMP doesn't matter, though; U2 >> with 2.6.x will freeze eventually even if a uniprocessor. SMP just lets >> it fail more quickly. Problem is believed to be SCSI or Sbus, I think, >> but I don't know that anyone is sure. The kernel people have known >> about this for well over a year, but no fix. >> >> For more current information, you might ask squash@gentoo.org or >> weeve@gentoo.org --- I haven't tried 2.6 on U2 for a while because no >> one has claimed to have a fix for this problem. (Gentoo spent a lot of >> time on this freeze a few months ago, but no satisfaction. I am sure, >> though, that we ruled out SMP as the problem.) >> >> =20 >> >>> - >>> =20 >> Regards, >> >> =20 >> > Hi, >=20 > I'm running 2.6.20-rc5 on my ultra2 (2x300) for a few weeks now and have = > not > observed any freezes at all. I attach my config, maybe you can find some = > hint > what causes the problem. >=20 > Regards That doesn't really mean much. My U2 ran for 45 days on 2.6.12 before locki= ng up=20 solid. It was killed by a nightly rsync of the Gentoo portage tree. It had = done=20 the same sync 44 times previously, but that time took it out. With 2.6.17, = it=20 hard locked the first time I synced the tree on a new install, but that was= a=20 full sync instead of just a small subset like with 2.6.12. --=20 Andrew Gaffney http://dev.gentoo.org/~agaffney/ Gentoo Linux Developer Installer Project