linux-kernel - Re: [PATCH 2/2] [e1000 VLAN] Disable vlan hw accel when promiscuous mode

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Message-ID: <4739961E.90708@trash.net>
Date:	Tue, 13 Nov 2007 13:18:38 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	David Miller <davem@...emloft.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

Herbert Xu wrote:
> On Tue, Nov 13, 2007 at 04:06:24AM -0800, David Miller wrote:
>>> In other words we can make it so that nobody is in promiscuous
>>> mode and therefore have to disable VLAN acceleration *unless*
>>> they really want to be in that state.  In which case it would
>>> imply that they wish to see everything and therefore we should
>>> disable VLAN acceleration.
>> This is too complicated, we have multiple unicast MAC support
>> in the driver API already, let's simply use it.
> 
> Yes I agree.  People not using Patrick's new API deserves to
> get poor performance so they can switch over sooner :)
> 
> What I was trying to say above is that e1000 currently uses
> the old set_multicast_list interface (rather than dev_set_rx_mode)
> so it's not immediately obvious why we're in promiscuous mode.
> We could look at dev->promiscuity - !!uc_count but that feels a
> bit fragile.
> 
> Perhaps those who want to push this patch should be encouraged
> to convert e1000 to the new interface :)


I already posted a patch for this, not sure what happened to it.
Auke, any news on merging the secondary unicast address support?

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