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To: bertrand <joel.bertrand@...>
From: Ferris McCormick <fmccor@g.o>
Subject: Re: [Repost] Ultra2 SMP freezes with heavy disk I/O
Date: Wed, 21 Mar 2007 11:38:48 +0000
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.  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@g.o or
weeve@g.o --- 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.)

> -
Regards,

-- 
Ferris McCormick (P44646, MI) <fmccor@g.o>
Developer, Gentoo Linux (Devrel, Sparc)

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Re: [Repost] Ultra2 SMP freezes with heavy disk I/O
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Updated Jun 17, 2009

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