Re: [PATCH v4 03/30] rcu: Add a small-width RCU watching counter debug option

Le Tue, Jan 14, 2025 at 06:51:16PM +0100, Valentin Schneider a écrit :

A later commit will reduce the size of the RCU watching counter to free up some bits for another purpose. Paul suggested adding a config option to test the extreme case where the counter is reduced to its minimum usable width for rcutorture to poke at, so do that.

Make it only configurable under RCU_EXPERT. While at it, add a comment to explain the layout of context_tracking->state.

Link: http://lore.kernel.org/r/4c2cb573-168f-4806-b1d9-164e8276e66a@paulmck-laptop Suggested-by: Paul E. McKenney paulmck@kernel.org Signed-off-by: Valentin Schneider vschneid@redhat.com Reviewed-by: Paul E. McKenney paulmck@kernel.org

Reviewed-by: Frederic Weisbecker frederic@kernel.org