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: <CADkLE3U-2Mmq5r=G+tHzz3QZbA78vAFkOPdEO7+uBc-C9MbB8A@mail.gmail.com>
Date:	Mon, 22 Aug 2011 20:30:41 -0400
From:	Colin Walters <walters@...bum.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Oleg Nesterov <oleg@...hat.com>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, lennart@...ttering.net,
	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, Aug 17, 2011 at 9:37 AM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>
> Now I can see why you want to know when processes exit and do it without
> tampering with the process, but it seems to me that's simply a question
> of us lacking a way to do this nicely, whether inotify/dnotify/etc
> on /proc, some kind of 'also signal me' property or some kind of process
> event interface.

Yes please!  The fact that in Unix one can only get notifications of a
process exiting when one is the parent is just lame, and SIGCHLD (like
all signals) sucks.  Lennart was tossing around a "childfd" namespace
proposal...
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