linux-kernel - Re: [RFC][patch 00/12] clocksource / timekeeping rework V2

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Date:	Wed, 29 Jul 2009 10:17:12 -0700
From:	Daniel Walker <dwalker@...o99.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	john stultz <johnstul@...ibm.com>
Subject: Re: [RFC][patch 00/12] clocksource / timekeeping rework V2

On Wed, 2009-07-29 at 19:09 +0200, Martin Schwidefsky wrote:
> On Wed, 29 Jul 2009 11:02:21 -0600
> dwalker@...o99.com wrote:
> 
> > On Wed, 2009-07-29 at 18:50 +0200, Martin Schwidefsky wrote:
> > 
> > > void clocksource_change_rating(struct clocksource *cs, int rating)
> > 
> > > the two functions do different things. What exactly is the idea you've
> > > got in mind?
> > 
> > It's only the case when the rating goes to zero .. That makes the
> > clocksource unusable, which is very much like unregistering it..
> 
> True, the clocksource code won't pick the clock any more as long as
> there is an alternative clock available. It still shows up in the list
> of clocks though and you can do an override with it. 

I'm not sure allowing that type of override a good idea tho .. I don't
think it's considered a usable clock when the rating goes to zero.

Daniel

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