alignment faults in 3.6

[Maxime Bizon]

On Thu, 2012-10-11 at 13:28 +0200, Eric Dumazet wrote:

> You probably are aware that a driver can use : 
> 
> - a fragment to hold the frame given by the hardware, with whatever
> alignment is needed by the hardware.
> 
> Then allocate an skb with enough room (128 bytes) to pull the headers as
> needed later.
> 
> skb = netdev_alloc_skb_ip_align(dev, 128);

What happen at tx time, supposing that same hardware cannot do SG ?

Aren't we going to memcpy the data into the head ?

-- 
Maxime