Re: [PATCH] efinet: add efinet_multicast_filter command

[Josef Bacik <jbacik@fb.com>]

On 11/05/2015 03:28 PM, Vladimir 'phcoder' Serbinenko wrote:
> I don't have EFI spec under my hand now. Can we get away with making it
> a default or at least for the case when no interface overrides mac
> address. Extra config to workaround firmware bugs is usually harmful
>

http://wiki.phoenix.com/wiki/index.php/EFI_SIMPLE_NETWORK_PROTOCOL

That is what I've been using.  The thing I worry about is that this is 
just the multicast address for ipv6.  There's a wikipedia page that 
lists about 15 addresses for different things.  Now how many do we care 
about for grub?  I have no idea.  I _think_ that we only really care 
about multicast traffic for ipv6 router advertisements, I can't think of 
when else we'd want to use it.  So in that sense I think it would be ok 
to do this.  But I have no way of knowing what would break in current 
working configurations which is why I went with the config option.  I 
can test with the variety of hardware I have here and see how it does 
with it set by default.  It's up to you, I'm good either way.  Thanks,

Josef