Re: [PATCH] Revert "sched/core: Tweak wait_task_inactive() to force dequeue sched_delayed tasks"

[Matt Fleming]

On Fri, Sep 26, 2025 at 3:43 AM K Prateek Nayak <kprateek.nayak@xxxxxxx> wrote:
>
> Hello John, Matt,
>
> On 9/26/2025 5:35 AM, John Stultz wrote:
> >
> > However, there are two spots where we might exit dequeue_entities()
> > early when cfs_rq_throttled(rq), so maybe that's what's catching us
> > here?
>
> That could very likely be it.

That tracks -- we're heavy users of cgroups and this particular issue
only appeared on our kubernetes nodes.

> Matt, if possible can you try the patch attached below to check if the
> bailout for throttled hierarchy is indeed the root cause. Thanks in
> advance.

I've been running our reproducer with this patch for the last few
hours without any issues, so the fix looks good to me.

Tested-by: Matt Fleming <mfleming@xxxxxxxxxxxxxx>