[Devel] Re: [Patch 1/3] Miscellaneous container fixes

[Paul Menage]

On 12/1/06, Srivatsa Vaddagiri <vatsa at in.ibm.com> wrote:
> This patches fixes various bugs I hit in the recently posted container
> patches.
>
> 1. If a subsystem registers with fork/exit hook during bootup (much
>    before rcu is initialized), then the resulting synchronize_rcu() in
>    container_register_subsys() hangs. Avoid this by not calling
>    synchronize_rcu() if we arent fully booted yet.
>
> 2. If cpuset_create fails() for some reason, then the resulting
>    call to cpuset_destroy can trip. Avoid this by initializing
>    container->...->cpuset pointer to NULL in cpuset_create().
>
> 3. container_rmdir->cpuset_destroy->update_flag can deadlock on
>    container_lock(). Avoid this by introducing __update_flag, which
>    doesnt take container_lock().

Ah - this may be the lockup that PaulJ hit.

Thanks for these fixes.

Paul