[openib-general] [PATCH] IB/ipoib: NAPI

Roland Dreier rdreier at cisco.com
Mon Sep 25 09:41:26 PDT 2006


    Todd> Its inefficient to peek the CQ if the next operation is
    Todd> likely to then be a poll.  Performing the poll_and_notify in
    Todd> one call is more efficient.

Yes, but if you think carefully about how to implement NAPI for IPoIB,
you'll see that poll-and-notify is not a useful operation.  If a
device does not support the "exact" Mellanox CQ notify semantics, then
there is no way around using peek CQ somehow.

 - R.




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