Public bug reported:
Binary package hint: sysvinit
In certain cases at shutdown/reboot, the network is cut before CIFS
filesystems are properly unmounted by umountnfs.sh. This results in a
long timeout in the CIFS unmount that prevents shutdown/reboot from
completing.
An example of this is when users mount CIFS shares and use network-
manager default mode of operation, see (long) bug 211631 for more
details.
We are fixing things to make sure network is normally shut down after
network fs unmounts. However it would still be good to cover for
network-lost corner cases by avoiding that timeout altogether. Steve
French (CIFS upstream) analyzed the situation and we traced the timeout
back to a statfs call, resulting from the umount.cifs call.
Unmounting using "umount -i" in umountnfs.sh would bypass the call to
umount.cifs, which in turn would avoid the blocking statfs call, which
would avoid the long timeout issue. As umountnfs.sh is always called by
root it shouldn't cause an issue ?
** Affects: sysvinit (Ubuntu)
Importance: Undecided
Status: New
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umountnfs.sh should use "umount -i" to avoid CIFS umount timeout
https://bugs.launchpad.net/bugs/341084
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