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	Edward Tomasz Napierala <trasz@FreeBSD.org>
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Date: Tue, 22 Sep 2009 14:08:26 GMT
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
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Subject: kern/139062: panic on shutdown after busy snapshot removal
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>Number:         139062
>Category:       kern
>Synopsis:       panic on shutdown after busy snapshot removal
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 22 14:10:02 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Edward Tomasz Napierala
>Release:        9.0
>Organization:
>Environment:
>Description:
Reboot after removal of busy snapshot leads to panic with backtrace looking like this:

zfsctl_snapshot_inactive()
vinactive()
vgonel()
vflush()
zfs_umount()
dounmount()
vfs_unmountall()
boot()
reboot()
syscall()
Xfast_syscall()

>How-To-Repeat:
cd /usr/obj/.zfs/snapshot/blah/
ls -al
zfs destroy tank/obj@blah
reboot

>Fix:


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