On Wed, Nov 24, 2021 at 08:41:32PM -0800, Yury Norov wrote: > On Wed, Nov 24, 2021 at 04:47:20PM -0800, Paul E. McKenney wrote: > > On Tue, Nov 23, 2021 at 01:37:07AM +0100, Frederic Weisbecker wrote: > > > If a user wants to boot without any CPU in offloaded mode initially but > > > with the possibility to offload them later using cpusets, provide a way > > > to simply pass an empty "rcu_nocbs" kernel parameter which will enforce > > > the creation of dormant nocb kthreads. > > > > Huh. This would have been a use for Yury Norov's "none" bitmask > > specifier. ;-) > > > > I pulled this one in with the usual wordsmithing. > > > > Thanx, Paul > > I think 'rcu_nocbs=,' should work as 'none'. But I admit that it looks > awkward. The following patch adds clear 'none' semantics to the parser. > If you like it, I think you may drop non-documentation part of this > patch. I don't have real objection, but I fear that "rcu_nocbs=none" might be interpretated as rcu_nocbs is entirely deactivated, whereas "rcu_nocbs" alone makes it clear that we are turning something on. We can support both though. Thanks.
