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

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Message-ID: <20101119004210.GK6024@const.famille.thibault.fr>
Date:	Fri, 19 Nov 2010 01:42:10 +0100
From:	Samuel Thibault <samuel.thibault@...-lyon.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Lennart Poettering <mzxreary@...inter.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Mike Galbraith <efault@....de>,
	Vivek Goyal <vgoyal@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

H. Peter Anvin, le Thu 18 Nov 2010 16:35:59 -0800, a écrit :
> On 11/16/2010 12:05 PM, Lennart Poettering wrote:
> > On Tue, 16.11.10 19:08, Peter Zijlstra (a.p.zijlstra@...llo.nl) wrote:
> > 
> >>
> >> On Tue, 2010-11-16 at 18:03 +0100, Lennart Poettering wrote:
> >>> Binding something like this to TTYs is just backwards. No graphical
> >>> session has a TTY attached anymore. And there might be multiple TTYs
> >>> used in the same session. 
> >>
> >> Using a group per tty makes sense for us console jockeys..
> > 
> > Well, then maybe you shouldn't claim this was relevant for anybody but
> > yourself. Because it is irrelevant for most users if it is bound to the TTY.
> > 
> 
> For what it's worth, I suspect that the object that should be bound to
> is probably not the tty, but rather the session ID of the process (which
> generally is 1:1 with controlling TTY for console processes.)

Agreed.

That'll catch both the tty case (implemented by the proposed patch), and
the rest.

Samuel
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