K 10
svn:author
V 5
trasz
K 8
svn:date
V 27
2009-02-05T08:46:18.475200Z
K 7
svn:log
V 327
In some situations, mnt_lockref could go negative due to vfs_unbusy() being
called without calling vfs_busy() first.  This made umount(8) hang waiting
for mnt_lockref to become zero, which would never happen.

Reviewed by:	kib
Approved by:	rwatson (mentor)
Reported by:	pho
Found with:	stress2
Sponsored by:	FreeBSD Foundation

END