On Tue, 10 Apr 2018, Matthew Wilcox wrote: > > 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. Objects can be freed and reused and still be accessed from code that thinks the object is the old and not the new object....
