linux-kernel - Re: + prctl-add-pr_setget_child_reaper-to-allow-simple-process-supervision .patch added to -mm tree

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Message-ID: <20110818124353.GA2839@tango.0pointer.de>
Date:	Thu, 18 Aug 2011 14:43:53 +0200
From:	Lennart Poettering <mzxreary@...inter.de>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Kay Sievers <kay.sievers@...y.org>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-man@...r.kernel.org,
	roland@...k.frob.com, torvalds@...ux-foundation.org
Subject: Re: +
 	prctl-add-pr_setget_child_reaper-to-allow-simple-process-supervision
 	.patch added to -mm tree

On Wed, 17.08.11 15:45, Oleg Nesterov (oleg@...hat.com) wrote:

> You should mark the whole process as sub-reaper, not a single thread
> which does prctl(). The parent/child relationship is process-wide.

Hmm, how would we implement this best? Would it be sufficient to follow
group_leader pointer to set/get the flag, and to follow real_parent
instead of parent when looking for the reaper task (i.e. the one with
the flag set)?

Lennart

-- 
Lennart Poettering - Red Hat, Inc.
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