Re: [PATCH 3/4] move exit_ptrace() from forget_original_parent() to do_exit()

[Oleg Nesterov <oleg@redhat.com>]

On 02/19, Roland McGrath wrote:
>
> > If we ever change exit_ptrace() to do the blocking calls, it makes
> > sense to move it after exit_signals().
>
> I'm not sure I understand this comment.  I guess you just mean that if we
> block, we should be sure to do the exit_signals() pass-the-pending-buck
> work afterwards.

Another reason: it is better to set PF_EXITING asap, before doing something
which can block/etc. PF_EXITING means that complete_signal()->wants_signal()
will not pick us as ->curr_target.

> OK.  But I think we want it after exit_signals anyway so
> that ptrace_traceme() can check PF_EXITING (cf 1/4 review).

Yes, you are right.

> Also, I think this patch should be the very last of the series.

Agreed.

Oleg.