On Tue, 08 Mar 2005 18:00:49 +0100
Andi Kleen <ak@xxxxxx> wrote:
> Baruch Even <baruch@xxxxxxxxx> writes:
> > I can squeeze the tcp_skb_cb to one pointer at the expense of extra
> > work to remove a packet from the list (the other pointer is the prev
> > pointer).
> You could also use a xor list in theory. But I'm not sure it's worth it.
> Increasing cb by 4 bytes shouldn't be a very big issue.
Going from "40" to "44" takes 64-bit platforms onto another cache line
for struct sk_buff, as I stated in another email.
And every time I let this happen, I get an email from David Mosberger because
it shows up in performance tests on ia64. :-)