MFC r323973,324087

  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".

  Optimize vm_object_page_remove() by eliminating pointless calls to
  pmap_remove_all().  If the object to which a page belongs has no
  references, then that page cannot possibly be mapped.

(cherry picked from commit 2d2427db5b735ecdb6fe8ad9251f524b4260bb6a)

0 files changed, 0 insertions, 0 deletions