zero-copy support on TSEC?

[Andy Fleming]

On Jun 26, 2006, at 13:26, Bizhan Gholikhamseh ((bgholikh)) wrote:

> Hi ALL,
> We have developed a custom board mother board based on
> MPC8541 processor running Linux 2.6.11.
>
> In our system, most of the ingress UDP packets  are retransmitted
> with one modification to data portion of the packet (one byte). As you
> see there are many copy overhead due to copy from system to userland
> and vise versa which has impacted our system performance.
>
> Is there a zero-copy support for TSEC
> to eliminate the buffer copy from kernel to userland and vise versa?


I'm not sure there's any way, at present, in Linux to avoid the user/ 
kernel copying.  You might want to ask on the netdev at vger.kernel.org  
list, though.

Andy