On Tue, Apr 10, 2018 at 12:30:23PM -0500, Christopher Lameter wrote: > On Tue, 10 Apr 2018, Matthew Wilcox wrote: > > > If we want to get rid of the concept of constructors, it's doable, > > but somebody needs to do the work to show what the effects will be. > > How do you envision dealing with the SLAB_TYPESAFE_BY_RCU slab caches? > Those must have a defined state of the objects at all times and a constructor > is > required for that. And their use of RCU is required for numerous lockless > lookup algorithms in the kernhel.
Not at all times. Only once they've been used. Re-constructing them once they've been used might break the rcu typesafety, I suppose ... would need to examine the callers.