Hi All,
I have a couple of questions:
Do kernel threads get preempted? Or do they have to
give up the CPU on their own?
Are there any rules for what scheduling policies and
priority a kernel thread can have?
reparent_to_init()sets the scheduling policy to
SCHED_OTHER. Do you see a problem with changing the
scheduling policy to SCHED_FIFO?
Thanks,
Akram
On Mon, 2003-02-03 at 19:52, [email protected] wrote:
These questions might be better asked on the kernelnewbies list...
> Do kernel threads get preempted? Or do they have to
> give up the CPU on their own?
Without the preemptive kernel, they are not preemptive. With
preempt-kernel, they are. They tend to run at elevated priorities
anyhow, so this is not so much of an issue.
> Are there any rules for what scheduling policies and
> priority a kernel thread can have?
> reparent_to_init()sets the scheduling policy to
> SCHED_OTHER. Do you see a problem with changing the
> scheduling policy to SCHED_FIFO?
kernel threads can have any scheduling policy or priority - they really
do not differ much from regular threads (sans the lack of address
space).
Some kernel threads do indeed run with real-time policy.
Robert Love