On Wed, Nov 19, 2025 at 10:26:43AM +0100, Eugenio Perez Martin wrote: > > But this is not the logic that is > > implemented in this patch as there's no synchronize_rcu() in the > > vduse_set_group_asid_nomsg(). > > We only set the pointer on the writer's side, we do nothing like > freeing resources. Should we set the pointer before or after > syncrhonize_rcu()?
synchronize_rcu is called after writer makes it's changes. > What do we need to do on the other side of > syncrhonize_rcu()? Presumably, return so the caller knows the as has been updated. However, user-triggerable synchronize_rcu() is almost always a bug. If that's what is going on, you want srcu. -- MST
