K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-06-23T08:28:13.036683Z
K 7
svn:log
V 422
In vm_page_xunbusy_maybelocked(), add fast path for unbusy when no
waiters exist, same as for vm_page_xunbusy().  If previous value of
busy_lock was VPB_SINGLE_EXCLUSIVER, no waiters existed and wakeup is
not needed.

Move common code from vm_page_xunbusy_maybelocked() and
vm_page_xunbusy_hard() to vm_page_xunbusy_locked().

Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Approved by:	re (gjb)

END