On Thu, Jan 21, 2016 at 1:27 AM, Tom Herbert [off-list ref] wrote:

Unfortunately, the hardware hash from devices hasn't really lived up
to its potential. The original intent of getting the hash from device
was to be able to do packet steering (RPS and RFS) without touching
the header. But this never was implemented. eth_type_trans touches
headers and GRO is best when done before steering. Given the
weaknesses of Toeplitz we talked about recently and that fact that
Jenkins is really fast to compute, I am starting to think maybe we
should always do a software hash and not rely on HW for it...

Could you provide some details on the weaknesses of Toeplitz?
FYI, the admin is able to configure non-default keys for Toeplitz
through ethtool.

Or.