Re: [PATCH 2/6] sched/core: Propagate parent task's latency requirements to the child task

[Vincent Guittot]

On Tue, 22 Mar 2022 at 01:22, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx> wrote:
>
> On Fri, 2022-03-11 at 17:14 +0100, Vincent Guittot wrote:
> >
> > Signed-off-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
> > ---
> >  init/init_task.c    | 1 +
> >  kernel/sched/core.c | 4 ++++
> >  2 files changed, 5 insertions(+)
> >
> > diff --git a/init/init_task.c b/init/init_task.c
> > index 73cc8f03511a..2afa249c253b 100644
> > --- a/init/init_task.c
> > +++ b/init/init_task.c
> > @@ -78,6 +78,7 @@ struct task_struct init_task
> >       .prio           = MAX_PRIO - 20,
> >       .static_prio    = MAX_PRIO - 20,
> >       .normal_prio    = MAX_PRIO - 20,
> > +     .latency_nice   = 0,
>
> Probably better to use non hardcoded number here
>         .latency_nice   = DEFAULT_LATENCY_NICE;

yes
>
> >       .policy         = SCHED_NORMAL,
> >       .cpus_ptr       = &init_task.cpus_mask,
> >       .user_cpus_ptr  = NULL,
> >
>
> Tim
>