6697534: Premature GC and invalid lgrp selection with NUMA-aware allocator. Summary: Don't move tops of the chunks in ensure_parsibility(). Handle the situation with Solaris when a machine has a locality group with no memory. Reviewed-by: apetrusenko, jcoomes, ysr

6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled Summary: Construct the relevant CMSIsAliveClosure used by CMS during parallel reference processing with the correct span. It had incorrectly been constructed with an empty span, a regression introduced in 6417901. Reviewed-by: jcoomes