FT status and macvlan performance problems

Simon Wunderlich simon.wunderlich at openmesh.com
Fri Mar 24 07:25:00 PDT 2017

Hi Michael,

sorry for the late follow-up, I'd like to discuss and issue regarding your FT 
patches sent by you. We have tested both Benjamin and your patches, and found 
some performance problems. With our QCA9558/988x (using ath10k) based Access 
points, enabling macvlans on top of bridges result in an performance drop of 

We have investigated the reason, and it seems like enabling promiscous mode is 
causing this problem. We have seen that Benjamins version of using a raw 
socket on the bridge [1] can be used without enabling promiscous mode and 
keeping the higher performance. However, we when using macvlan, promiscous 
mode seems to always be enabled implicitly.

So far, I have not seen your patch [2] merged and it's marked deferred in 
patchwork [3]. Are you still working on the patch? Or is it in some queue 
which I didn't find, or superseded somehow? Would you consider reworking it to 
be usable without macvlans?

Thank you!

[1] https://www.spinics.net/lists/hostap/msg02219.html
[2] https://www.spinics.net/lists/hostap/msg02362.html
[3] https://patchwork.ozlabs.org/patch/674403/
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