K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2019-12-29T17:10:21.775162Z
K 7
svn:log
V 272
Fix GEOM_MOUNTVER orphanization.

Previous code closed and detached consumer even with I/O still in progress.
This patch adds locking and request counting to postpone the close till
the last of running requests completes.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.

END