netdev - Re: TX pre-headers...

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Message-ID: <20090209100713.GA8299@gondor.apana.org.au>
Date:	Mon, 9 Feb 2009 21:07:13 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: TX pre-headers...

David Miller <davem@...emloft.net> wrote:
>
> I think the way to solve this is to have each device indicate how
> much TX slack space it neads for it's preheaders.  On device
> registration we have some global "netdev_max_tx_hdr_space" that
> records the maximum value seen.

We can already solve it right now with dev->needed_headroom.

Of course it's not optimal because it involves a copy so we
might still need your solution.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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