Re: CIFS shares keep hanging with VirtualBox

["Frédéric L. W. Meunier" <fredlwm-fLz7/M+a0ZzR7s880joybQ@public.gmane.org>]

On Thu, Apr 19, 2012 at 03:19:13PM -0500, Steve French wrote:
> On Thu, Apr 19, 2012 at 2:43 PM, Frédéric L. W. wrote:
> >
> > I captured a log with 'tcpdump', but I don't think it's of any use. It
> > stopped logging at 16:01 but the hang happened after that. It didn't log
> > anything from the problematic 'ls', 'kill -9' and 'umount /mnt/ntfs2'.
> 
> Maybe capture a log (with netmon on wireshark) on the windows side
> to see what the trace shows.
> 
> Presumably some odd networking issue with virtual box, but
> may  be useful to see which command fails/timesout by
> looking at dmesg output on the client (running the
> test after enabling /proc/fs/cifs/cifsFYI setting it
> to 7 e.g.).
> 
> At least with the server returning maxmpx of 50, it is less
> likely to be the bug with too many outstanding requests.

I noticed that if I change the connection in VirtualBox from NAT to 
Bridged Adapter, the hangs don't occur (at least after about 2h).

Are you still interested in a log from Windows in NAT mode, where the 
hangs happen, or this is definitely an issue / "feature" in VirtualBox ?

What I don't know is if CIFS could do anything to exit gracefully 
instead of deadlocking the application trying to access the share.