Consistent file system hang with RELENG_6 of today ...

[Marc G. Fournier]

On Fri, 29 Jul 2005, Robert Watson wrote:

>
> On Fri, 29 Jul 2005, Marc G. Fournier wrote:
>
>> Now, as most of the "old timers" here know, my jail environment makes use 
>> of unionfs to "mount" a template layer, to share common binaries amongst 
>> the VMs ...
>> 
>> I have tried two different ways of doing this, both result in the exact 
>> same 'file system hang' ... and I have a core of each 'method' ...
>> 
>> The first was to use mount_devfs to, of course, mount the /dev directory 
>> within the jail itself ...
>> 
>> The second, I used the same /dev that existed within the jail, based on 
>> bulding a jail using a 4.x system ...
>> 
>> In both cases, the hang appears to be at the same spot, where 'sendmail' 
>> (in this case, the postfix port) starts up ...
>
> It would also be interesting to know: if you take unionfs out of the picture 
> (i.e., you use a regular file system for testing purposes), does the problem 
> go away?

Just checked this, and yes, the jail starts if unionfs is not involved ... 
the problem is in unionfs itself :(

And, there hasn't been any changes that I can see in unionfs since May 
3rd ... so it seems a fairly 'long standing' bug :(

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664