linux-kernel - Re: [PATCH v7 0/8] Tunable sched_mc_power

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Date:	Thu, 08 Jan 2009 09:06:48 +0100
From:	Mike Galbraith <efault@....de>
To:	svaidy@...ux.vnet.ibm.com
Cc:	balbir@...ux.vnet.ibm.com, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v7 0/8] Tunable sched_mc_power_savings=n

On Wed, 2009-01-07 at 21:05 +0530, Vaidyanathan Srinivasan wrote:

> sched_mc=2 depends on NEWIDLE but the wakeup biasing part will be
> enabled even without this flag.  The power savings will be marginally
> better than sched_mc=1 without NEWIDLE.  But the end user can have
> that setup if they want to.

That implies to me that there should exist a flag SD_WAKEUP_BIAS or
whatnot.  All settings should be visible.  Currently, sched_mc > 0 turns
on NEWIDLE, which is visible, but 2 turns on this 'invisible to the
ultimate low-level control interface' thing.

	-Mike

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