It turns out that my three previous posts have been about half right. After further research and testing I have concluded that: - This is a zombie bug. I recommend this bug be marked as yet another in the long list of duplicate bugs for #211631. - Sander Marechal's umountcifs is not needed for a workaround. - The root cause is that Network Manager, controlled by upstart, terminates early and disables the network interfaces before the cifs shares are unmounted. To validate this, I disabled network manager and manually brought up my wireless interface using iwconfig and ifconfig. With two shares mounted a normal shutdown was achieved on ten successive trials. - Comment #139 in bug #211631 notes that Linux Mint 10 does not have this problem by virtue of relinking umountnfs to K15umountnfs in rc0.d and rc6.d. I validated this by achieving ten successive normal shutdowns with two shares mounted and my wireless connection controlled by Network Manager. (Note that Glen Robinson's comment #139 says umountnfs was originally linked as S43umountnfs whereas my 11.04 installation had umountnfs.sh linked as S31umountnfs.sh. I am unable to explain the discrepancy.) Glen also states that he did not have the problem with a hardwire network, as I reported in comment #7 above. - Since this is a race (timing) problem, there is no guarantee that either of the above two workarounds would be effective for all situations. - My cifs management script was interfering with shutdown, confusing my investigation of the original problem . I think I have that fixed now. How unusual - a bug in my code!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/768506 Title: CIFS VFS Server is slowing down shutdown -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
