netdev - Re: [PATCH 0/3] net: propagate dynamic needed

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Message-ID: <CAGVrzcZQ79rVcezAM7rk6dMBnHySCn3b5wL98npOx=LM=Tb6Mw@mail.gmail.com>
Date:	Tue, 20 Aug 2013 15:24:37 +0100
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	netdev <netdev@...r.kernel.org>, amwang@...hat.com,
	Stephen Hemminger <stephen@...workplumber.org>,
	kaber@...sh.net, David Miller <davem@...emloft.net>,
	vyasevic@...hat.com, Johannes Berg <johannes@...solutions.net>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH 0/3] net: propagate dynamic needed_headroom/tailroom changes

2013/8/20 Jiri Pirko <jiri@...nulli.us>:
> Tue, Aug 20, 2013 at 02:45:49PM CEST, f.fainelli@...il.com wrote:
>>Hi all,
>>
>>This patchset aims at allowing dynamically changing a given device
>>needed_headroom/tailroom space and propagating such events to stacked
>>devices such as bridges and vlans.
>
> You should also add support for other stacked devices, like bonding,
> team, macvlan, ovs-datapath, etc.

Ok, will take a look at these.

>
>>
>>Unless callers use the new helpers (dev_set_headroom/dev_set_tailroom)
>>there is no functional change introduced.
>>
>>I tested this with an out of tree Ethernet driver with both VLANs and
>>bridges and the need for a 64-byte headroom to insert a transmit
>>status descriptor in front of a SKB.
>
> Would be nice to add at least one driver which would use your new api.

cxgb, niu, ps3_gelic_net and gianfar could probably directly benefit
from this change.

Thanks for your feedback!
--
Florian
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