netdev - Re: [patch 1/1] proc connector: add event for process becoming session leader

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Message-Id: <20090812180231.1bdebc03.akpm@linux-foundation.org>
Date:	Wed, 12 Aug 2009 18:02:31 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, scott@...ntu.com, johnpol@....mipt.ru,
	matthltc@...ibm.com, oleg@...sign.ru
Subject: Re: [patch 1/1] proc connector: add event for process becoming
 session leader

On Wed, 12 Aug 2009 17:32:03 -0700 (PDT) David Miller <davem@...emloft.net> wrote:

> From: akpm@...ux-foundation.org
> Date: Thu, 06 Aug 2009 16:05:47 -0700
> 
> > From: Scott James Remnant <scott@...ntu.com>
> > 
> > The act of a process becoming a session leader is a useful signal to a
> > supervising init daemon such as Upstart.
> > 
> > While a daemon will normally do this as part of the process of becoming a
> > daemon, it is rare for its children to do so.  When the children do, it is
> > nearly always a sign that the child should be considered detached from the
> > parent and not supervised along with it.
> > 
> > The poster-child example is OpenSSH; the per-login children call setsid()
> > so that they may control the pty connected to them.  If the primary daemon
> > dies or is restarted, we do not want to consider the per-login children
> > and want to respawn the primary daemon without killing the children.
> > 
> > This patch adds a new PROC_SID_EVENT and associated structure to the
> > proc_event event_data union, it arranges for this to be emitted when the
> > special PIDTYPE_SID pid is set.
> > 
> > [akpm@...ux-foundation.org: coding-style fixes]
> > Signed-off-by: Scott James Remnant <scott@...ntu.com>
> > Acked-by: Matt Helsley <matthltc@...ibm.com>
> > Cc: Oleg Nesterov <oleg@...sign.ru>
> > Cc: Evgeniy Polyakov <johnpol@....mipt.ru>
> > Cc: "David S. Miller" <davem@...emloft.net>
> > Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> 
> Acked-by: David S. Miller <davem@...emloft.net>

Ta.

> This is more process handling level stuff than actual networking
> or connector bits, so it should probably be merged via akpm's
> usual patch bombs or some other relevant tree.
> 
> Andrew, if you really want, I can take this into net-next-2.6

No probs, I'll send it for 2.6.32-rc1.
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