On 25-Feb-2001 Fabrice Peix wrote:
>
>
>
> Yop,
>
> Just a newbie question ...
> Why sys_sched_yield don't call schedule ?
>
>
> man page of sched_yield tell :
>
> "A process can relinquish the processor voluntarily
> without blocking by calling sched_yield.
> The process will then be moved to the end
> of the queue for its static priority and
> a new process gets to run."
>
It sets, under certain conditions ( nr_running ), the variable need_resched
and, in the system call return code this value is checked and schedule() is
called.
Look at sched.c and entry.S.
- Davide
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