On Mon, May 11, 2020 at 09:23:01PM +0200, Vincent Guittot wrote:
> enqueue_task_fair() jumps to enqueue_throttle when cfs_rq_of(se) is
> throttled, which means that se can't be NULL and we can skip the test.
>
> Signed-off-by: Vincent Guittot
> ---
> kernel/sched/fair.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 4b73518aa25c..910bbbe50365 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -5512,7 +5512,6 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p,
> int flags)
> list_add_leaf_cfs_rq(cfs_rq);
> }
>
> -enqueue_throttle:
> if (!se) {
> add_nr_running(rq, 1);
> /*
> @@ -5534,6 +5533,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p,
> int flags)
>
> }
>
> +enqueue_throttle:
> if (cfs_bandwidth_used()) {
> /*
>* When bandwidth control is enabled; the cfs_rq_throttled()
Right, se can't be NULL when we break upon throttling. Looks good to me.
Thanks,
Pavan
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