Re: [RFC PATCH v3 04/15] rcu: Add a small-width RCU watching counter debug option

On 20/11/24 15:50, Peter Zijlstra wrote:

On Tue, Nov 19, 2024 at 04:34:51PM +0100, Valentin Schneider wrote:

...

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.

Note that this means it will get selected by allyesconfig and the like, is that desired?

I would say no

If no, depends on !COMPILE_TEST can help here.

Noted, thank you!