Re: [RFC][PATCH] cpus_allowed/launch_policy patch, 2.4.16

Davide Libenzi (davidel@xmailserver.org)
Wed, 5 Dec 2001 18:39:55 -0800 (PST)


On Wed, 5 Dec 2001, Matthew Dobson wrote:

> pid_t enforce_launch_policy_fork() {
> pid_t pp = fork();
> if (pp == 0) {
> set_affinity(getpid(), get_affinity());
> ...
> }
> return pp;
> }
>
> but, as soon as one of them exec()'s their no longer going to be using your
> functions.

That's the point, cpus_allowed is automatically inherited by the child in
kernel/fork.c
So once you spawn a child with the proposed function, all its dinasty (
if it's not explicitly changed ) will have the same cpu affinity.

- Davide

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