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Re: [Xen-devel] Re: [PATCH 1/6][RESEND] xen: Add NUMA support to Xen

On 15 May 2006, at 18:11, Ryan Harper wrote:

When I looked at the x86_64 NUMA code, I noticed that SRAT parsing was
done by ACPI_NUMA (drivers/acpi/numa.c).  That code requires more ACPI
support than Xen currently has available. Rather than pulling in all of
that ACPI, I chose to start with the i386 SRAT table parser which was
sufficient for both i386 and x86_64.  I would think that using the
modified i386 srat.c for parser gets the job done without bringing in
all of the support needed to compile drivers/acpi/numa.c in Xen.

How about putting the two together: use the i386 SRAT parser and the
x86_64 srat.c for structures and initialization?

I guess it depends how cleanly it can be done. Can we use the x86/64 logic pretty much unmodified, but then pull in bits of the i386 parsing code as functions that the x86/64 code calls rather than the full-blown acpi routines it would usually call into? Or would it be possible to pull in drivers/acpi/numa.c without also having to pull in all 80kloc+ of acpi crap? This probably needs some thought and/or experimentation!

 -- Keir

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