netdev - Re: [PATCH net-next V1 1/9] IB/ipoib: Add support for clones / multiple childs on the same partition

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Message-ID: <50073484.9070501@intel.com>
Date:	Wed, 18 Jul 2012 15:11:16 -0700
From:	John Fastabend <john.r.fastabend@...el.com>
To:	David Miller <davem@...emloft.net>, or.gerlitz@...il.com
CC:	roland@...nel.org, netdev@...r.kernel.org, ali@...lanox.com,
	sean.hefty@...el.com, shlomop@...lanox.com, erezsh@...lanox.co.il
Subject: Re: [PATCH net-next V1 1/9] IB/ipoib: Add support for clones / multiple
 childs on the same partition

On 7/18/2012 2:36 PM, David Miller wrote:
> From: Or Gerlitz <or.gerlitz@...il.com>
> Date: Thu, 19 Jul 2012 00:24:58 +0300
>
>> On Wed, Jul 18, 2012 at 9:38 PM, David Miller <davem@...emloft.net> wrote:
>>> From: Or Gerlitz <ogerlitz@...lanox.com>
>>
>>>> All sorts of childs are still created/deleted through sysfs, in a
>>>> similar manner to the way legacy child interfaces are.
>>
>>> Network device instantiation of this type is the domain of
>>> rtnl_link_ops rather than ugly sysfs interfaces.
>>
>> Didn't add any **new** sysfs interfaces in this patch. The IPoIB sysfs
>> entries to create child devices are there from IPoIB's day one, and
>> we're only extending them a tiny bit.
>
> That's extremely unfortunate, having private ways of instantiating
> networking devices leads to an extremely poor user experience.
>
> Would you like to have to train every single user in the case
> where each and every driver author makes his own unique way
> of configuring his hardware?
> --

Or,

I've got a rough patch to use rtnl_link_ops to add what we've been
calling 'virtual machine device queues' or VMDq. This looks a lot
like macvlan with offloaded switching and I believe similar to your
child case above.

Also what is a "pkey"

I'll post it as a use at your own risk shortly although this week I'm
short on time so maybe next week I can get something more "real" out.
Been stealing cycles between other work things today.

If you want to do complete it more power to you.

.John
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