K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2019-09-25T17:08:35.711721Z
K 7
svn:log
V 463
Add some counters for per-VM page events.

For now, just count batched page queue state operations.
vm.stats.page.queue_ops counts the number of batch entries that
successfully completed, while queue_nops counts entries that had no
effect, which occurs when the queue operation had been completed before
the batch entry was processed.

Reviewed by:	alc, kib
MFC after:	1 week
Sponsored by:	Intel, Netflix
Differential Revision:	https://reviews.freebsd.org/D21782

END