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    SubjectRe: hardware time stamping with optional structs in data area
    On Wed, Jan 28, 2009 at 10:52:13AM +0100, Patrick Ohly wrote:
    > Putting that into shinfo should work fine. I thought extending that
    > structure with information that isn't needed for all packets was as bad
    > as extending sk_buff itself. If that isn't the case, then extending
    > shinfo definitely is the simplest solution.

    Not at all, the sk_buff has its own slab while skb->head uses
    kmalloc. The latter has loads of free space due to padding for
    common MTUs such as 1500 or header-only.

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