Re: Problems with SMP on Alpha UP2000+

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On 06-05 00:23, Magnus Lindholm wrote:
> Hi,
>=20
> I have a UP2000+ system with dual 21264 @ 667MHz/4MB cache and 2GB RAM. T=
he
> 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 f=
ew
> 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+ Alp=
ha
> system? First I suspected faulty hardware, but RedHat 7.2 seems to work j=
ust
> fine so...
>=20
> 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?
>=20
> The system has a Matrox Millenium and a 3Com 3c509B Ethernet card and a S=
CSI
> 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 C=
PU
> 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. :/

--=20
Witold Baryluk

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