[PATCH 0/4] pid_ns_prepare_proc/unshare cleanups

[Oleg Nesterov]

On 06/18, Oleg Nesterov wrote:
>
> I only try to discuss the idea to break the circular reference.

I don't know what I have missed, but this looks really right to me.
Besides, we have yet another problem: proc_flush_task()->mntput()
is just wrong. Consider the multithreaded execing init.

I am going to simplify, test, and send the fix which moves mntput()
into free_pid_ns() paths.

But first of all I think we should cleanup the pid_ns_prepare_proc()
logic. Imho, this code is really ugly. Please see the patches.

The last one, 4/4, is orthogonal to other changes.

Oleg.

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