Re: [PATCH 09/11] rcu: Fix callbacks processing time limit retaining cond_resched()

[Valentin Schneider]

On 30/09/21 00:10, Frederic Weisbecker wrote:
> The callbacks processing time limit makes sure we are not exceeding a
> given amount of time executing the queue.
>
> However its "continue" clause bypasses the cond_resched() call on
> rcuc and NOCB kthreads, delaying it until we reach the limit, which can
> be very long...
>
> Make sure the scheduler has a higher priority than the time limit.
>
> Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
> Cc: Valentin Schneider <valentin.schneider@xxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
> Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>
> Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
> Cc: Neeraj Upadhyay <neeraju@xxxxxxxxxxxxxx>
> Cc: Uladzislau Rezki <urezki@xxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Reviewed-by: Valentin Schneider <valentin.schneider@xxxxxxx>