linux-kernel - Re: [RFC PATCHSET] ptrace,signal: Fix notifications to the real parent while ptraced

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Date:	Wed, 9 Mar 2011 17:50:07 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	roland@...hat.com, jan.kratochvil@...hat.com,
	vda.linux@...glemail.com, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	indan@....nu
Subject: Re: [RFC PATCHSET] ptrace,signal: Fix notifications to the real
	parent while ptraced

On 03/08, Tejun Heo wrote:
>
> This patchset implements "P2. Fix notifications to the real parent" of
> the ptrace job control improvements proposal[1].

And at first glance this does what we discussed before. I mean, even if
(perhaps) this series has some problems/bugs it looks right "in general"
to me.

> As the whole job control / ptrace logic is quite delicate, I tried to
> be very granual with changes and add plenty of explanations for
> subtleties.

Yeah... And right now I have some concerns about the details, but I am
not ready to share them. Will try tomorrow, it turns out I need to re-read
the previous series.

Say, even 1/8 doesn't look exactly right with the current ptrace code,
WARN_ON_ONCE() can be easily triggered afaics.

Oleg.

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