Roland Dreier wrote:
Actually I was planning on sending it for 2.6.33, since it's so small and
obvious and we're reasonable early in the cycle. Not sure about -stable though
-- has this been hit in practice?
I agree that it should go into 2.6.33, since its so small there's no
reason to wait for 2.6.34. As for the being hit question: note that
without there is both bug in the overflow check and creation of extra
contention between the post recv and poll send cq flows, for ULPs that
have their send cq different from the recv cq, e.g IPoIB, I came a cross
this bug when reviewing the mlx4 posting code when during some profiling.
I wonder if the overflow check could be removed all together and be left
to the ULP (kernel is trusted environment...) is there any risk in doing
so? this way the WR posting code will not experience contention with the
poll WC code on the CQ lock.
Or.
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