Re: [PATCH v2] tracing: Don't account for cpu idle time with irqsoff tracers

From: Arnd Bergmann
Date: Tue May 27 2014 - 16:11:43 EST


On Tuesday 27 May 2014 13:08:04 Stephen Boyd wrote:
> @@ -380,7 +382,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
>
> cpu = raw_smp_processor_id();
>
> - if (per_cpu(tracing_cpu, cpu))
> + if (per_cpu(timings_stopped, cpu) || per_cpu(tracing_cpu, cpu))
> return;
>
> data = per_cpu_ptr(tr->trace_buffer.data, cpu);
>

Where exactly do you see other code calling here while
per_cpu(timings_stopped) is set? Would it be possible to just
change that call site?

Arnd
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