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SubjectRe: [PATCH 5/9] sched/hotplug: Consolidate task migration on CPU unplug
On Mon, Sep 21, 2020 at 06:36:02PM +0200, Peter Zijlstra wrote:

[...]

> +
> + [CPUHP_AP_SCHED_WAIT_EMPTY] = {
> + .name = "sched:waitempty",
> + .startup.single = NULL,
> + .teardown.single = sched_cpu_wait_empty,
> + },
> +
> /* Handle smpboot threads park/unpark */

Unless I missed something, now that the wait has its own HP step, this
patch can probably also get rid of the balance_hotplug_wait() in
sched_cpu_deactivate() introduced by:

[PATCH 4/9] sched/core: Wait for tasks being pushed away on hotplug

--
Vincent

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