kern/178999: dev entries for cloned zvol don't show up until after reboot

[Steve Wills]

>Number:         178999
>Category:       kern
>Synopsis:       dev entries for cloned zvol don't show up until after reboot
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon May 27 01:30:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Steve Wills
>Release:        
>Organization:
>Environment:
FreeBSD meatwad.mouf.net 10.0-CURRENT FreeBSD 10.0-CURRENT #3 r250925: Thu May 23 02:54:31 UTC 2013     root at meatwad.mouf.net:/usr/obj/usr/src/sys/MEATWAD  amd64

>Description:
When creating a zvol on a zfs pool, the /dev/zvol/pool/* entries show up correctly, however when making snapshots or cloning them, they do not.
>How-To-Repeat:

zfs create -V 1G pool/somevol
ls /dev/zvol/pool # witness somevol entries
zfs create pool/somevol at somesnap
ls /dev/zvol/pool # witness no new entries
zfs clone pool/somvol at somesnap pool/anothervol
ls /dev/zvol/pool # again witness no new entries
reboot
ls /dev/zvol/pool # witness missing entries appearing

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: