[Samba] nmbd eats cpu for breakfast after upgrade from 3.5 to 3.6

[Jeremy Allison]

On Tue, Apr 17, 2012 at 10:59:45AM +0300, Ander Punnar wrote:
> Hello.
> 
> I have Samba 3.6.4 with LDAP backend
> with domain logons enabled.
> 
> Long time I was running 3.5.1? from
> Debian Squeeze backports without any problems.
> 
> Few days ago I decided (after testing) to upgrade
> to 3.6.4, also from Debian backports.
> 
> Next morning nobody could login
> and nmbd was eating up a enitre cpu core.
> Killing nmbd with -9 and restarting samba
> solved the problem.
> 
> Same happened again next day.
> It could be machine related, since this problem
> didin't come up in test environment with identical machine
> and network configuration.
> 
> And yes, network connectivity was okay.
> I have had problems with nmbd in the past
> when network connectivity at least for one interface
> disappears, but this time this wasn't issue.
> 
> Any ideas?

What does strace -p <nmb-pid> say ?