linux-kernel - Re: [PATCH 1/8] job control: Don't set group_stop exit

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Message-ID: <20110323170920.GB24304@redhat.com>
Date:	Wed, 23 Mar 2011 18:09:20 +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: [PATCH 1/8] job control: Don't set group_stop exit_code if
	re-entering job control stop

On 03/23, Tejun Heo wrote:
>
> Hey,
>
> On Wed, Mar 23, 2011 at 05:40:14PM +0100, Oleg Nesterov wrote:
> > > Hmmm... There are two competing signals in that case - SIGTTIN sent by
> > > the parent and SIGSTOP sent by someone else.
> >
> > "someone else" can be PTRACE_CONT(SIGSTOP) from the debugger.
>
> The debugger should be doing PTRACE_CONT(notified_signo).

Why? it can change the signal.

> Am I
> missing something?  Anyways, this doesn't really matter. I kinda like
> just testing STOP_STOPPED both in stop initiation and notification
> paths but well it's no biggie either way.

OK, agreed, please forget.

Oleg.

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