[Bug 727100] v4l2bufferpool: Race condition on qbuf/dqbuf in a multithreaded context

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=727100
  GStreamer | gst-plugins-good | 1.2.3

Nicolas Dufresne <nicolas.dufresne> changed:

           What    |Removed                     |Added
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             Status|NEEDINFO                    |NEW

--- Comment #14 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-05-14 13:44:11 UTC ---
Well, it's not has bad as it looks like. As qbuf/dqbuf only occurs on writable
buffers. Hence the buffers[] array will stay consistent (as long as we fix the
order issue). The real problem is the num_queued counter and it's usage for
copy threashold. I'll give it more thought, but I think we can keep it lockless
(as this is what the GstBufferPool design suggest to do).

I think some work is needed even in git master.

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