Re: RFC: Network privilege separation.

Evgeniy Polyakov
2009-01-12T20:27:40Z

On Mon, Jan 12, 2009 at 10:15:27PM +0200, Rémi Denis-Courmont (rdenis@simphalempin.com) wrote:
> > I don't think that's given. It would need some restructuring,
> > but I think the end result would be likely worth it.
>
> A normal DVD would be over 30 megabytes per seconds once decoded, just for the
> video. And remember vmsplice() is not allowed by SECCOMP. Media players have
> assembly-coded memory copy optimizations (like the kernel) for some reason.

Just a note: memory copy is way too faster than 30 mb/s, and very likely
it is not the memory copy, but (de)compression, since likely all modern
codecs are limited by the CPU and not the memory bandwidth.

--
Evgeniy Polyakov