linux-kernel - Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

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Message-ID: <87mxp53z72.fsf@gmail.com>
Date:	Fri, 19 Nov 2010 14:12:17 -0500
From:	Ben Gamari <bgamari.foss@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>
Cc:	mzxreary@...inter.de, tytso@....edu, a.p.zijlstra@...llo.nl,
	debiandev@...il.com, alan@...rguk.ukuu.org.uk,
	dhaval.giani@...il.com, efault@....de, vgoyal@...hat.com,
	oleg@...hat.com, markus@...ppelsdorf.de,
	mathieu.desnoyers@...icios.com, mingo@...e.hu,
	linux-kernel@...r.kernel.org, balbir@...ux.vnet.ibm.com
Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

On Fri, 19 Nov 2010 09:51:14 -0800, Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> And the user level approach? I think it's fine too. If you run systemd
> for other reasons (or if the gnome people add it to the task launcher
> or whatever), doing it there isn't wrong. I personally think it's
> somewhat disgusting to have a user-level callback with processes etc
> just to clean up a group, but whatever.  As long as it's not common,
> who cares?
> 
On that note, is there a good reason why the notify_on_release interface
works the way it does? Wouldn't it be simpler if the cgroup simply
provided a file on which a process (e.g. systemd) could block?

I guess it's a little too late at this point considering the old
mechanism will still need to be supported, but it seems like this would
provide a slightly cheaper cleanup path. Just my (perhaps flawed) two
pence.

> 
> So guys, calm down. We don't need to hate each other.
>
Thanks for the nudge back to sanity.

Cheers,

- Ben
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