Re: [PATCH v3 25/25] context_tracking, rcu: Rename rcu_dyntick trace event into rcu_watching

From: Valentin Schneider
Date: Thu Jul 25 2024 - 10:47:48 EST


On 25/07/24 14:39, Frederic Weisbecker wrote:
> Le Wed, Jul 24, 2024 at 04:43:25PM +0200, Valentin Schneider a écrit :
>> The "rcu_dyntick" naming convention has been turned into "rcu_watching" for
>> all helpers now, align the trace event to that.
>>
>> To add to the confusion, the strings passed to the trace event are now
>> reversed: when RCU "starts" the dyntick / EQS state, it "stops" watching.
>>
>> Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx>
>> ---
>> include/trace/events/rcu.h | 16 ++++++++--------
>> kernel/context_tracking.c | 10 +++++-----
>> 2 files changed, 13 insertions(+), 13 deletions(-)
>>
>> diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
>> index 4066b6d51e46a..e51ef658437f0 100644
>> --- a/include/trace/events/rcu.h
>> +++ b/include/trace/events/rcu.h
>> @@ -466,40 +466,40 @@ TRACE_EVENT(rcu_stall_warning,
>> /*
>> * Tracepoint for dyntick-idle entry/exit events. These take 2 strings
>> * as argument:
>> - * polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not
>> + * polarity: "Start", "End", "StillWatching" for entering, exiting or still not
>> * being in dyntick-idle mode.
>> * context: "USER" or "IDLE" or "IRQ".
>
> So that should be:
>
> * polarity: "Start", "End", "StillWatching" for exiting, entering or still not
> being in EQS mode.
>
> Right?
>

Yep that's better, thanks!

> Other than that:
>
> Reviewed-by: Frederic Weisbecker <frederic@xxxxxxxxxx>