Re: [PATCH V4 02/19] trace/osnoise: Split workload start from the tracer start

Daniel Bristot de Oliveira
2021-10-25T07:58:42Z

On 10/23/21 04:25, Steven Rostedt wrote:
> On Thu, 21 Oct 2021 14:56:40 +0200
> Daniel Bristot de Oliveira <bristot@kernel.org> wrote:
>
>> +/*
>> + * osnoise_workload_stop - stop the workload and unhook the events
>> + */
>> +static void osnoise_workload_stop(void)
>> +{
>> + if (!osnoise_busy)
>> + return;
>> +
>> + trace_osnoise_callback_enabled = false;
>
> I know this is just moving this code, but the original code had this
> issue too, but there should be a comment here to why we need the
> compiler barrier.

I will add a comment, like we have on hwlat.

-- Daniel

> -- Steve
>
>
>> + barrier();
>> +
>> + stop_per_cpu_kthreads();
>> +
>> + unhook_irq_events();
>> + unhook_softirq_events();
>> + unhook_thread_events();
>> +
>> + osnoise_busy = false;
>> +}
>> +