From mboxrd@z Thu Jan 1 00:00:00 1970 From: bertrand Date: Wed, 21 Mar 2007 12:26:42 +0000 Subject: Re: [Repost] Ultra2 SMP freezes with heavy disk I/O Message-Id: <46012482.2020302@systella.fr> 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="utf-8" Content-Transfer-Encoding: 8bit To: sparclinux@vger.kernel.org Ferris McCormick a écrit : > On Wed, 2007-03-21 at 10:53 +0100, bertrand wrote: >> Ferris McCormick a écrit : >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA1 >>> > > --- snip --- > >>>> JKB >>> 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. >> What is your U2 configuration ? I have only one U2 and I cannot test on >> this station because it's a mail server :-( In fact, I think it should >> be interesting to know if this trouble come from SMP, ESP or Sbus >> support. It is impossible to build a kernel with debug information (it >> does not boot due to a address not aligned...), but I have tested the >> same kernel on a U1E (with the same ESP chip and two additional >> HappyMeal Ethernet cards on Sbus slots). It perfectly works. Can you try >> a 2.6 on U2 without SMP support ? >> >> Regards, >> >> JKB > > 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. I have seen your post on gentoo-sparc mailing list. I have made some search to find more posts wihtout any success. I'm not sure this trouble was known, I haven't seen any post on kernel mailing list. > 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. I have seen some posts about ESP troubles. For me, all ESP troubles were fixed on sparc64. > 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.) I have seen you have tried to build a 2.6 kernel with gcc-3.3 and 3.4. I have tried 4.0 and 4.1 with the same result. Regards, JKB