linux-kernel - Re: [RFC][PATCH] Adjust SHIFT_PLL to improve NTP convergence.

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Date:	Thu, 7 May 2009 12:37:05 -0700
From:	john stultz <johnstul@...ibm.com>
To:	George Spelvin <linux@...izon.com>
Cc:	ulrich.windl@...uni-regensburg.de, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, williams@...hat.com, zippel@...ux-m68k.org
Subject: Re: [RFC][PATCH] Adjust SHIFT_PLL to improve NTP convergence.

On Thu, May 7, 2009 at 11:07 AM, George Spelvin <linux@...izon.com> wrote:
> - If there were some mechanism to make the divisor consistent across
>  boots, that would be helpful.  Imagine a file in /sys that I could
>  write with an absolute frequency at boot time as long as it was within
>  1000 ppm (0.1%) of the kernel's measurement.
>
> Thinking about it, the third option seems the most useful.  It's
> basically a cleaned-up tickadj.

Indeed. Something similar to the lpj= boot option might be nice. I'll
take a look at that.

thanks
-john
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