Messages in this thread | | | Date | Thu, 22 Oct 2020 14:53:55 +0200 | From | Frederic Weisbecker <> | Subject | Re: [patch 1/2] nohz: only wakeup a single target cpu when kicking a task |
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On Tue, Oct 20, 2020 at 03:52:45PM -0300, Marcelo Tosatti wrote: > On Thu, Oct 15, 2020 at 01:40:53AM +0200, Frederic Weisbecker wrote: > > Alternatively, we could rely on p->on_rq which is set to TASK_ON_RQ_QUEUED > > at wake up time, prior to the schedule() full barrier. Of course that doesn't > > mean that the task is actually the one running on the CPU but it's a good sign, > > considering that we are running in nohz_full mode and it's usually optimized > > for single task mode. > > Unfortunately that would require exporting p->on_rq which is internal to > the scheduler, locklessly. > > (can surely do that if you prefer!)
May be:
bool task_on_rq(struct task_struct *p) ?
Thanks.
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