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Message-Id: <20071113.033611.73195922.davem@davemloft.net>
Date: Tue, 13 Nov 2007 03:36:11 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: herbert@...dor.apana.org.au
Cc: kaber@...sh.net, joonwpark81@...il.com, w@....eu,
cfriesen@...tel.com, auke-jan.h.kok@...el.com,
netdev@...r.kernel.org,
djohnson+linux-kernel@...starentnetworks.com,
linux-kernel@...r.kernel.org, e1000-devel@...ts.sourceforge.net
Subject: Re: [PATCH 2/2] [e1000 VLAN] Disable vlan hw accel when
promiscuous mode
From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Tue, 13 Nov 2007 19:09:23 +0800
> I agree. People doing a tcpdump don't have to turn on promiscuous
> mode, that's what the -p option is for. In other words, having
> promiscuous mode disable VLAN filtering does not take away the
> user's options at all.
>
> In fact, the very definition of promiscuous is to turn off hardware
> filtering, albeit the filtering of MAC addresses rather than VLAN
> tags. So it would seem logical to have it turn off VLAN filtering
> too.
Ok.
The performance implications can be pretty severe however.
I wish we could address this somehow.
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