[ofa-general] [PATCH] IB/core: handle race between elements in qork queues after event

[Roland Dreier]

 > OK. Here is an example that was viewed in our tests.
 > One IPoIB host (client) sends a stream of multicast packets to another IPoIB host (server).
 > SM takeover event takes place during traffic and as a result multicast info is flushed
 > and there is a need to rejoin by hosts. Without the patch there is a chance (which according to our experience
 > is a very big chance) that the request to rejoin will be to the old  SM and only after a retry join completes successfully.
 > This takes too long and the patch solves it.

OK, that is fairly convincing (and it would be nice to include when
sending the original patch).

Please resend a version that fixes the races in the patch and we can
probably add this for 2.6.27.

 - R.