Subject: Re: hme, IFF_SIMPLEX
To: None <itojun@iijlab.net>
From: Martin Husemann <martin@duskware.de>
List: tech-net
Date: 08/29/2002 18:13:11
On Fri, Aug 30, 2002 at 12:07:01AM +0900, itojun@iijlab.net wrote:
> 	isn't it better to make it to always behave as IFF_SIMPLEX, by
> 	dropping multicast packet from itself?  see smc91cxx.c.

I'm not sure. It would add an ether_cmp() to a criticial path, but unlike
the smc91cxx.c case not only in promiscuous mode. Maybe it should only check
that if we are in half-duplex mode?

But on the other hand, the current solution does not cause any performance
hit and works - what's the problem with it?

Martin

P.S.: btw: while searching for docs on the hme I ran accross notions of it
being able to do hardware checksums, is there any reason we do not use that
feature?