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Jeff Roberson authored
more consistent with other NUMA features as UMA_ZONE_FIRSTTOUCH and UMA_ZONE_ROUNDROBIN. The system will now pick a select a default depending on kernel configuration. API users need only specify one if they want to override the default. Remove the UMA_XDOMAIN and UMA_FIRSTTOUCH kernel options and key only off of NUMA. XDOMAIN is now fast enough in all cases to enable whenever NUMA is. Reviewed by: markj Discussed with: rlibby Differential Revision: https://reviews.freebsd.org/D22831
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