On Mon, Aug 01, 2005 at 12:27:42AM -0500, Paul Mackerras wrote: > From: Mike Kravetz <[EMAIL PROTECTED]> > > If CONFIG_NUMA is set, some POWER 4 systems will fail to boot. This is > because of special processing needed to handle invalid node IDs (0xffff) > on POWER 4. My previous patch to handle memory 'holes' within nodes > forgot to add this special case for POWER 4 in one place. > > In reality, I'm not sure that configuring the kernel for NUMA on POWER 4 > makes much sense. Are there POWER 4 based systems with NUMA characteristics > that are presented by the firmware? But, distros want one kernel for all > systems so NUMA is on by default in their kernels. The patch handles those > cases.
IIRC, In SMP mode the NUMA topology is exported. I've tried this on a p690 and it worked correctly on older kernels (2.6.10 or 2.6.11) I also noticed a nice speedup on a few things compared to LPAR mode :-) Sonny - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
