[discuss] Re: [LinuxBIOS] NUMA support for dual core Opteron

Langsdorf, Mark mark.langsdorf at amd.com
Thu Jul 14 21:14:23 CEST 2005

> On Thu, 2005-07-14 at 20:48 +0200, Andi Kleen wrote:
> > > AFIAK, for x86_64 kernel, it will try to read NUMA configuration 
> > > from HW directory. We don't have to export any ACPI table.
> > 
> > It doesn't work for dual core or 8 sockets for some reason. 
> Since the 
> > SRAT code works fine and is in general more future proof we never 
> > tracked down why. Patches welcome.
> > 
> Does each core has its own memory controller?

No.  Each processor has its own memory controller.  A processor
may have 1 or more cores.  (A processor is a physical package.
A core is a complete logic execution unit).  All cores in a processor
have equivalent access to the processor's memory controller.

-Mark Langsdorf
AMD, Inc.

More information about the coreboot mailing list