Long delay unmounting remote filesystems on shutdown

[dr.spock]

Hi all.

I have two machines with Dapper Drake (one dist-upgraded from breezy when dapper was beta and another installed from scratch from the final 6.06 LTS CD). Both machines are up-to-date.

The problem occours when I leave samba shares mounted and I shut down Ubuntu. "Unmounting remote filesystems..." takes a lot . It switches to text mode and shows:

[4294848.96900] CIFS VFS: No response for cmd 50 mid 46
[4294908.96900] CIFS VFS: No response for cmd 50 mid 223

'mid' number is different each time. The delay may be of 2 minutes on a Celeron M370.

I use mount.cifs (suid root) in order to mount five W2K3 shares, over a wireless connection using wifi-radar for roaming.

If I call the umountnfs.sh script from console as root:

# /etc/init.d/umountnfs.sh start

it does nothing.

Note that the same scripts we user for mounting that shares works perfectly on a Fedora Core 5 machine, and it shuts down fast and cleanly. The only difference is that wifi-radar is not used on that laptop.

I hope this is a duplicate of a solved bug, but I haven't found it!

Cheers.

[Vipul Delwadia (vipul-delwadia)]

I have this happening too, when connecting to a share using cifs over a wireless connection (WPA with Network Manager)

I'm running Dapper Drake 6.06LTS with the latest updates.

I don't know exactly how long the umounting takes, since I assumed it had hung and so I shut it off manually (power button held down).

Maybe the solution is to either disconnect all mounted network shares before turning off the network connection (either wired or wireless) or have the cifs umount program not wait for a response (since there is no route to host anyway!).

Cheers,
Vipul

[Lukáš Zapletal (lzap)]

Exactly same for me. I dont know if is it long delay -- I have never waited and switched comp off. I have several connections with Samba and NFS over OpenVPN. It seems OpenVPN stops BEFORE this and the unmoutn script is not able to unmout.

Very annoying. I created init script that will unmount all remote mounts before the openvpn stops - with no luck. Still it halts.

[dr.spock (dr.spock)]

Same behavior after dist-upgrade to edgy.

Cheers,
Àlex García.

[Lukáš Zapletal (lzap)]

Nope, I use Dapper.

[François Montel (zerohalo)]

I confirm the exact same behavior on two different machines both in Dapper and Edgy.

This problem is not confined to network mounts made over wifi. I experience the same problem with CIFS mounts on Windows machines on our LAN over wire.