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

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Message-Id: <1287481199.24189.5.camel@marge.simson.net>
Date:	Tue, 19 Oct 2010 11:39:59 +0200
From:	Mike Galbraith <efault@....de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC/RFT PATCH] sched: automated per tty task groups

On Tue, 2010-10-19 at 11:26 +0200, Peter Zijlstra wrote:
> On Tue, 2010-10-19 at 11:16 +0200, Mike Galbraith wrote:
> > Greetings,
> > 
> > Comments, suggestions etc highly welcome.
> 
> You might be wanting to exclude RT tasks from the tty groups since there
> is no interface to grant them any runtime and such :-)

:)

> Also, I think tty_sched_move_task and sched_move_task() should be
> sharing lots more code -- I recently proposed a fix for
> sched_move_task() because the Android people complained, but they
> haven't replied back yet..

Yeah. I should be able to just do sched_move_task(), but it doesn't
currently work even with your patch, turning tty_sched on/off can lead
to incredible delays before you get box back.  With virgin source, it's
size infinity for all intents and purposes.

	-Mike

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