linux-kernel - Re: 'global' rq->clock

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Message-Id: <20080503.020502.226847930.davem@davemloft.net>
Date:	Sat, 03 May 2008 02:05:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	a.p.zijlstra@...llo.nl, efault@....de, elendil@...net.nl,
	parag.warudkar@...il.com, linux-kernel@...r.kernel.org,
	guichaz@...oo.fr, andi@...stfloor.org
Subject: Re: 'global' rq->clock

From: Ingo Molnar <mingo@...e.hu>
Date: Sat, 3 May 2008 10:28:50 +0200

> * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> 
> > Yeah, I was thinking of a way for architectures to signify how much 
> > help they need building the various clocks. Sparc, power and s390 
> > would not need any help.
> 
> there's already such a mechanism in sched-devel.git (and has been there 
> for a week or two): an architecture can set time_sync_thresh to -1LL 
> during early bootup and essentially disable all the synchronization 
> logic.

Does it remove all of the code too? :-)

Please give us a config boolean.  The only platform for which
a run-time knob is even necessary is x86.

Thanks.
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