From: Jakub Kicinski <>
Date: Thu, 9 Aug 2018 20:26:08 -0700

> It is not immediately clear why this is needed.  The memory and
> updating two sets of counters won't come for free, so perhaps a
> stronger justification than troubleshooting is due? :S
> Netdev has counters for fallback vs forwarded traffic, so you'd know
> that traffic hits the SW datapath, plus the rules which are in_hw will
> most likely not match as of today for flower (assuming correctness).
> I'm slightly concerned about potential performance impact, would you
> be able to share some numbers for non-trivial number of flows (100k
> active?)?

Agreed, features used for diagnostics cannot have a harmful penalty for
fast path performance.

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