On Wed, Jun 12, 2024 at 09:06:25AM -0700, Paul E. McKenney wrote: > We are looking into nice ways of solving this, but in the meantime, > yes, if you are RCU-freeing slab objects into a slab that is destroyed > at module-unload time, you currently need to stick with call_rcu() > and rcu_barrier(). > > We do have some potential solutions to allow use of kfree_rcu() with > this sort of slab, but they are still strictly potential. > > Apologies for my having failed to foresee this particular trap! > > Thanx, Paul No worries, thanks for the help and clarification! This at least restored my sanity, was starting to doubt my understanding of RCU and the batman-adv code the longer I tried to find the issue in batman-adv :D.
