K 10
svn:author
V 3
alc
K 8
svn:date
V 27
2017-09-24T16:50:10.428856Z
K 7
svn:log
V 388
Optimize vm_page_try_to_free().  Specifically, the call to pmap_remove_all()
can be avoided when the page's containing object has a reference count of
zero.  (If the object has a reference count of zero, then none of its pages
can possibly be mapped.)

Address nearby style issues in vm_page_try_to_free(), and change its
return type to "bool".

Reviewed by:	kib, markj
MFC after:	1 week

END