Re: [PATCH net-next-2.6] filter: optimize sk_run_filter

Stephen Hemminger
2010-11-19T17:15:40Z

On Fri, 19 Nov 2010 09:05:16 -0800 (PST)
David Miller <davem@davemloft.net> wrote:

> From: Eric Dumazet <eric.dumazet@gmail.com>
> Date: Fri, 19 Nov 2010 17:55:59 +0100
>
> > Unfortunatly on x86_32 it also chose that f_k was more valuable in a cpu
> > register and accumulator A lost its register to get a stack slot
> > instead.
>
> Ok that tradeoff is terrible, but it depends upon knowledge we haven't
> given to the compiler (yet).
>
> Let me think about this a bit...

Are 'register' modifiers a no-op on current GCC?