Re: [patch] sched_[set|get]_affinity() syscall, 2.4.15-pre9

[Davide Libenzi]

On Thu, 22 Nov 2001, Ingo Molnar wrote:

>
> the attached set-affinity-A1 patch is relative to the scheduler
> fixes/cleanups in 2.4.15-pre9. It implements the following two
> new system calls:
>
>  asmlinkage int sys_sched_set_affinity(pid_t pid, unsigned int mask_len,
>     unsigned long *new_mask_ptr);
>
>  asmlinkage int sys_sched_get_affinity(pid_t pid, unsigned int
>     *user_mask_len_ptr, unsigned long *user_mask_ptr);

I think that maybe it's better to have a new type :

typedef whatever-is-appropriate cpu_affinity_t;

with a set of macros :

CPU_AFFINITY_INIT(aptr)
CPU_AFFINITY_SET(aptr, n)
CPU_AFFINITY_ISSET(aprt, n)

so that we can simplify that interfaces :

asmlinkage int sys_sched_set_affinity(pid_t pid, cpu_affinity_t *aptr);
asmlinkage int sys_sched_get_affinity(pid_t pid, cpu_affinity_t *aptr);

- Davide