Gentoo Archives: gentoo-alpha

From: Witold Baryluk <baryluk@×××××××××××××.pl>
To: gentoo-alpha@l.g.o
Subject: Re: [gentoo-alpha] Problems with SMP on Alpha UP2000+
Date: Sun, 05 Jun 2011 14:55:31
In Reply to: [gentoo-alpha] Problems with SMP on Alpha UP2000+ by Magnus Lindholm
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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