Re: [PATCH] efinet: add efinet_multicast_filter command

[Andrei Borzenkov]

06.11.2015 02:47, Vladimir 'phcoder' Serbinenko пишет:
> If we can't figure out which ones we need to filter out, then it's
> unrealistic to expect our users to be able to configure. We need to go with
> multicast filter per default and switch to promiscuous only when we
> actually need it: when we override mac address. You can add function to go
> to promiscuous mode to network interface structure

I'm afraid if we cannot trust firmware the only solution is to simply 
use promiscuous mode. This is not as bad as it sounds, as with moder 
switches we won't get significantly more traffic anyway unless someone 
floods network with video broadcast, in which case grub is probably not 
the right place to fix it.

Also firmware is free to implement filter using promiscuous mode, so it 
may well be what we end up doing anyway.

And i386 did it all the time. I do not know how wide testing it 
received, but nobody complained about problems due to promiscuous.