linux-kernel - Re: [PATCH] clocksource: Avoid selecting mult values that might overflow when adjusted

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Message-ID: <1320333244.3681.22.camel@js-netbook>
Date:	Thu, 03 Nov 2011 11:14:04 -0400
From:	John Stultz <johnstul@...ibm.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Yong Zhang <yong.zhang0@...il.com>,
	David Daney <ddaney.cavm@...il.com>
Subject: Re: [PATCH] clocksource: Avoid selecting mult values that might
 overflow when adjusted

On Thu, 2011-11-03 at 15:52 +0100, Thomas Gleixner wrote:
> On Thu, 3 Nov 2011, Thomas Gleixner wrote:
> > On Thu, 3 Nov 2011, John Stultz wrote:
> > > Oh, and the other bit is that not all clocksources have been converted
> > > over to using clocksource_register_hz/khz, so some may be using very
> > > small shift values, which could more easily hit large % mult adjustment
> > > (due to the resulting coarseness of each integer change) that wouldn't
> > > cause overflows.
> > 
> > Fair enough. I'm queuing it.
> 
> That want's a cc stable as well, right ?

Good point. Yes.

thanks
-john


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