[Devel] Re: [PATCH 1/7] containers (V7): Generic container system abstracted from cpusets code

[Paul Menage]

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