Re: latest linus-2.5 BK broken

Benjamin LaHaise
2002-06-18T19:29:52Z

On Wed, Jun 19, 2002 at 04:51:31AM +1000, Rusty Russell wrote:
> You could do a loop here, but the real problem is the broken userspace
> interface. Can you fix this so it takes a single CPU number please?
>
> ie.
> /* -1 = remove affinity */
> sys_sched_setaffinity(pid_t pid, int cpu);
>
> This will work everywhere, and doesn't require userspace to know the
> size of the cpu bitmask etc.

That doesn't work. Think of SMT CPU pairs (aka HyperThreading) or
quads that share caches.

-ben
--
"You will be reincarnated as a toad; and you will be much happier."