SMP system not running SMP

Steve Kargl sgk at
Fri Jun 23 17:05:30 UTC 2006

On Fri, Jun 23, 2006 at 11:58:33AM -0500, Matthew D. Fuller wrote:
> On Fri, Jun 23, 2006 at 06:07:22AM -0500 I heard the voice of
> Peter Seebach, and lo! it spake thus:
> > 
> > There are two possible paths to fixing this:  One is to make SMP
> > work without ACPI.
> One thing to note is that in the dmesg you posted, there's no "ioapic"
> probed.  That suggests it's not really finding the APIC, which would
> be why SMP is failing.  It'd be getting that from ACPI normally, but
> AIUI (I'm way out of my depth here) it could find them in other ways.
> I vaguely recall somebody (John Baldwin, maybe?) doing something in
> this area of ways of enumerating CPU's/APIC's in the last 6
> monthsish...

I think you may be recalling the atpic device.

device          atpic                   # Optional legacy pic support


More information about the freebsd-amd64 mailing list