Scott Long 1a8959dac6 Multi-queue NIC drivers and multi-port lagg tend to use the same lower
bits of the flowid as each other, resulting in a poor distribution of
packets among queues in certain cases.  Work around this by adding a
set of sysctls for controlling a bit-shift on the flowid when doing
multi-port aggrigation in lagg and lacp.  By default, lagg/lacp will
now use bits 16 and higher instead of 0 and higher.

Reviewed by:	max
Obtained from:	Netflix
MFC after:	3 days
2013-12-30 01:32:17 +00:00
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