K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2019-03-21T13:30:48.145430Z
K 7
svn:log
V 339
nullfs: fix unmounts when filesystem is active.

If vflush() did not completely flushed the mount vnodes queue, either
retry for forced unmounts, or give up for non-forced.  This situation
can occur when new vnodes are instantiated while vflush() worked.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END