On Thu, Nov 25, 2021 at 02:28:53PM +0100, Frederic Weisbecker wrote: > 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. How about "rcu_nocbs=,"? ;-) Thanx, Paul > We can support both though. > > Thanks.
