On 2/12/07, Paul Menage <menage at google.com> wrote: > reaches zero. RCU is still fine for reading the container_group > pointers, but it's no good for updating them, since by the time you > update it it may no longer be your container_group structure, and may > instead be about to be deleted as soon as the other thread's > rcu_synchronize() completes. On further reflection, this probably would be safe after all. Since we don't call put_container_group() in attach_task() until after synchronize_rcu() completes, that implies that a container_group_get() from the RCU section would have already completed. So we should be fine. Paul
