On Wednesday, 12 June 2024 18:31:57 CEST Linus Lüssing wrote: > 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! > > 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.
Thanks Linus and Paul. I've queued up the revert. But feel free to submit a
version with updated text in case you want to incorporate information from
this thread.
Kind regards,
Sven
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