I see. Thanks for the explanation.

On 3 January 2014 12:36, Jesse Gross <[email protected]> wrote:
> On Fri, Jan 3, 2014 at 2:43 PM, Joe Stringer <[email protected]> wrote:
>> This patch adds the logic used for TCP and UDP in b0f3a2feef
>> (datapath: Use percpu allocator for flow-stats.) to SCTP. This should
>> help to detect longer-lived flows that match on SCTP, for use with the
>> per-cpu allocator for flow-stats.
>>
>> Signed-off-by: Joe Stringer <[email protected]>
>> ---
>> Pravin, I noticed that this code was added to TCP and UDP, and am
>> guessing that it's just as relevant to SCTP. If this doesn't make sense,
>> feel free to drop it.
>
> It wasn't an omission or at least not an accidental one. Not that many
> NICs recognize SCTP for the purposes of hashing on the L4 ports, which
> is the reason why packets would land on different CPUs. This is just a
> heuristic so it's not always right but that was the rationale.
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