smbfs mount wedges

[Kostik Belousov]

On Sun, Apr 29, 2007 at 07:00:54PM +0200, Ivan Voras wrote:
> I have this line in my /etc/fstab:
> 
> //ivoras at server/share  /home/ivoras/mnt  smbfs rw,noauto,-f640,-d750 0 0
> 
> But the command
> 
> # mount /home/ivoras/mnt
> 
> doesn't exit. The file system is mounted, I can see it in output of
> "mount" on another console, and I can access the files in it without
> problems, but the "mount" command never returns. It's stuck in state
> "devdrn", and can't be killed by SIGINT or SIGKILL.
> 
> This is a -CURRENT from few days ago.
> 
> Does smbfs work for someone?
> 

Take the
http://people.freebsd.org/~kib/misc/destroy_dev_sched.6.patch
In addition, replace calls to destroy_dev() in the smb cdev d_close()
method with destroy_dev_sched() (the precise location of that destroy_dev()
could be obtained by backtracing hung process in ddb).

This should fix "devdrn" hang. Please, report the results to me.
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