[ofa-general] Re: [PATCH] IB/ipoib: IPOIB CM rx use higher order fragments

Roland Dreier rdreier at cisco.com
Tue Oct 23 11:35:26 PDT 2007


 > In order to reduce the overhead of iterating the fragments of an
 > SKB in the receive flow, we use fragments of higher order and thus
 > reduce the number of iterations. This patch seams to improve receive
 > throughput of small UDP messages.

I don't think we want to do this -- it may be good for benchmarks but
it will hurt reliability, since systems often have highly fragmented
memory so higher-order atomic allocations will fail.

 - R.



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