[RFC] [PATCH 2/2] cgroups: make procs file writable

[Oleg Nesterov]

On 05/31, Oleg Nesterov wrote:
>
> I only glanced into one function, cgroup_attach_proc(), and some things
> look "obviously wrong". Sorry, I can't really read these patches now,
> most probably I misunderstood the code...

And, forgot to mention, I do not understand the PF_EXITING check in
attach_task_by_pid() (and some others).

At first glance, it buys nothing. PF_EXITING can be set right after
the check. And, what if we have the process with the exited group-leader?
In that case we can't use tgid to move this process?

Oleg.