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?

Actually, is there a way of seeing what file systems were mounted at the 
time of a panic from the core file?  The system hung once more last night, 
and I'm *certain* that it had nothing to do, this time, with my testing of 
the jails ... I got a core of that one as well ... if so, then the problem 
is somethign with the kernel since my last update on July 17th (I've 
loaded my old kernel, and so far things have been okay) ...

I'm going to try loading the jail using this July 17th kernel when I get 
back and see if it hangs as well ...

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