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Date: Wed, 07 Mar 2012 18:42:18 +0100
From: Andreas Oberritter <obi@opendreambox.org>
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Subject: Re: bitbake multi-processing semaphore in linux-vserver
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On 07.03.2012 18:14, Andreas Oberritter wrote:
> I tried to run today's BitBake master on Debian Squeeze,
> running inside a Linux-Vserver. I ran into the problem below:
> 
> Traceback (most recent call last):
>   File ".../bitbake/bin/bitbake", line 258, in <module>
>     ret = main()
>   File ".../bitbake/bin/bitbake", line 226, in main
>     server.initServer()
>   File ".../bitbake/lib/bb/server/process.py", line 245, in initServer
>     self.event_queue = ProcessEventQueue(0)
>   File "/usr/lib/python2.6/multiprocessing/queues.py", line 37, in __init__
>     self._rlock = Lock()
>   File "/usr/lib/python2.6/multiprocessing/synchronize.py", line 117, in __init__
>     SemLock.__init__(self, SEMAPHORE, 1, 1)
> OSError: [Errno 38] Function not implemented
> 
> Has anybody else seen this? Is it likely to be caused by limitations
> of Linux-Vserver? Are there any workarounds or patches available to
> address this?

I was able to get rid of the problem by mounting a tmpfs to /dev/shm.
Maybe BitBake should suggest this in a future error message.

Regards,
Andreas