Alan Cox c9af644e5c Eliminate (many) unnecessary calls to pmap_remove_all(). Pages from objects
with a reference count of zero can't possibly be mapped, so there is never a
need for vm_page_set_invalid() to call pmap_remove_all() on them.

Reviewed by:	kib
MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division
2015-09-17 22:28:38 +00:00
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