Re: [PATCH 2/2] context_tracking, rcu: Rename RCU_DYNTICKS_IDX to CT_DYNTICKS_IDX

[Frederic Weisbecker]

Le Wed, Mar 27, 2024 at 12:29:02PM +0100, Valentin Schneider a écrit :
> The symbols relating to the CT_STATE part of context_tracking.state are now
> all prefixed with CT_STATE.
> 
> The RCU dynticks counter part of that atomic variable still involves
> symbols with different prefixes, align them all to be prefixed with
> CT_DYNTICKS, as CT_DYNTICKS_MASK already is.
> 
> Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx>

It used to be that RCU extended quiescent state and dynticks enter/exit
were coupled. But this isn't the case anymore. Nowadays RCU stops watching
some time later after dynticks is entered.

I wonder if we shouldn't take advantage of that cleanup for a meaning that
really reflect that RCU stops watching from there.

Paul what do you think? CT_EQS_IDX ? CT_RCUEQS_IDX? CT_RCUOFF_IDX? ...?

Thanks.