# Re: \[PATCH 3/6\] sched,perf,kvm: Fix preemption condition

- From: Mathieu Desnoyers \<hidden\>
- Date: 2021-06-02 14:17:48 
- List: cgroups
- Page: https://ratatoskr.run/cgroups/2021/06/206989
- Thread: https://ratatoskr.run/linux-block/2021/06/206979/t.md

```text
----- On Jun 2, 2021, at 9:12 AM, Peter Zijlstra peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org wrote:
[...]
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -8568,13 +8568,12 @@ static void perf_event_switch(struct tas
> 		},
> 	};
> 
> -	if (!sched_in && task->state == TASK_RUNNING)
> +	if (!sched_in && current->on_rq) {
> 		switch_event.event_id.header.misc |=
> 				PERF_RECORD_MISC_SWITCH_OUT_PREEMPT;
> +	}
> 
> -	perf_iterate_sb(perf_event_switch_output,
> -		       &switch_event,
> -		       NULL);
> +	perf_iterate_sb(perf_event_switch_output, &switch_event, NULL);
> }

There is a lot of code cleanup going on here which does not seem to belong
to a "Fix" patch.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
```