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To: gentoo-alpha@g.o
From: "Witold Baryluk" <baryluk@...>
Subject: Re: Problems with SMP on Alpha UP2000+
Date: Sun, 5 Jun 2011 16:55:15 +0200
On 06-05 00:23, Magnus Lindholm wrote:
> Hi,
> 
> I have a UP2000+ system with dual 21264 @ 667MHz/4MB cache and 2GB RAM. The
> system runs fine with RedHat 7.2 Linux (downloaded from hp website) with an
> 2.4 SMP kernel. However, running Gentoo with an SMP kernel will eventually
> make the system freeze (i.e make -j2 when building a new kernel only lasts
> for a 30 seconds or so). I've also tried NetBSD-5.1, FreeBSD-6.4, and a few
> other Linux distros with the 2.6 kernel (make -j2 makes the system freeze).
> It seems like Linux kernel 2.4 is the only OS that works with SMP on my
> system. Has anyone else experienced something similar with an UP2000+ Alpha
> system? First I suspected faulty hardware, but RedHat 7.2 seems to work just
> fine so...
> 
> I heard somewhere that Linux going from 2.4 to 2.6 made some significant
> re-structuring of the SMP code that broke SMP support on some systems?
> 
> The system has a Matrox Millenium and a 3Com 3c509B Ethernet card and a SCSI
> disk hooked up to the on-board SCSI. I've tried unplugging the NIC and a
> using a DEC PowerStorm 3D30 in stead of the Matrox Millenium, different CPU
> modules and different RAM modules. All with the same results. There are no
> error messages to be seen anywhere when the system freezes up.

Very strange. SMP with 2.6 on Alpha works, at least on few machines i used.
Maybe you have faulty chipset, or UP2000+ wasn't tested
well enaugh by developers and maintainers of alpha port. :/

-- 
Witold Baryluk
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References:
Problems with SMP on Alpha UP2000+
-- Magnus Lindholm
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