The Solaris vmxnet3s driver's rx path passes up Ethernet headers that are
8-byte aligned, resulting in IP and TCP headers that are only 2-byte
aligned.  While this isn't a big problem, this results in slower accesses
to header fields accessed as 32-bit fields by the TCP/IP stack such as IPv4
addresses and TCP sequence and acknowledgment numbers.

Is this the case for other vmxnet3 driver implementations as well?  Any
thoughts on if/how this can be remedied?

Thanks,
-Seb
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