> Does any Alpha systems run MP yet?

Yes.  I have a cs20 which at the moment runs 1.6ZG from Dec 8 2003.
When it's not doing builds, it mostly runs setiathome on both CPUs,
and for that workload it seems to be pretty stable.  There was a brief
while at the end of November last year where the kernel would panic
briefly after completing autoconfiguration, but that problem was fixed
by Dec 8 (see PR port-alpha/23588).  That problem turned out to be MI
if I recall correctly.

A colleague of mine also has a similar cs20, and he has reported a
problem with "panic: locking against myself" triggered by an attempt
at installing openldap -- see PR port-alpha/23731.  It's also been
reproduced with a newer kernel.  There has so far been no feedback on
this particular PR.

Regards,

- H=E5vard