[patch] enabling APIC and NMI watchdog on UP systems

From: Ingo Molnar (mingo@elte.hu)
Date: Thu Sep 28 2000 - 14:19:29 EST

the attached patch (against test9-pre7) is a cleaned up version Keir
Fraser's APIC-on-UP patch, and adds the enabling code of Keith Owens which
programs P6 performance counter 0 as an NMI. (i simplified the code alot -
there is no problem at all with getting NMIs from two sources, and it's
not necessary to make it configurable.)

i'd like to hear about how this patch works for people - it works here on
SMP systems and on P6 systems. The watchdog is enabled unconditionally -
this should significantly help debugging lockups on UP systems as well!
(thanks Keir and Keith!)

        Ingo


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