nwhitehorn 489c1437aa Replace the SLB backing store splay tree used on 64-bit PowerPC AIM
hardware with a lockless sparse tree design. This marginally improves
the performance of PMAP and allows copyin()/copyout() to run without
acquiring locks when used on wired mappings.

Submitted by:	mdf
2010-09-16 00:22:25 +00:00
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