K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2018-03-22T19:21:11.226646Z
K 7
svn:log
V 489
Lock reservations with a dedicated lock in each reservation.  Protect the
vmd_free_count with atomics.

This allows us to allocate and free from reservations without the free lock
except where a superpage is allocated from the physical layer, which is
roughly 1/512 of the operations on amd64.

Use the counter api to eliminate cache conention on counters.

Reviewed by:	markj
Tested by:	pho
Sponsored by:	Netflix, Dell/EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D14707

END