Re: SMP on assym. x86

Mark Hahn
2001-03-21T16:33:04Z

> recently upgrading one of my two CPUs, I found kernel-2.4.2 to be unable to
> handle the situation with 2 different CPUs (AMP = Assymmetric
> multiprocessing ;-) correctly.

"correctly". Intel doesn't support this (mis)configuration:
especially with different steppings, not to mention models.

Alan has, or is working on, a workaround to handle differing
multipliers by turning off the use of RDTSC. this is the right approach
to take in the kernel: disable features not shared by both processors,
so correctly-configured machines are not penalized.
and the kernel should LOUDLY WARN ABOUT this stuff on boot.

regards, mark hahn.