Re: [tip:timers/ntp] ntp: adjust SHIFT_PLL to improve NTP convergence

[Rik van Riel]

John Stultz wrote:
> On Tue, 2009-06-02 at 01:22 +0200, Ingo Molnar wrote:

> > I might be missing something here - but Linux converging faster 
> > seems like a genuinely good thing. What non-Linux problem could 
> > there be? Linux's convergence is really Linux's private issue. 
>
> Yea. It does seem that way. Miroslav can likely expand on the issue to
> help clarify, but as I understand it, the example is if you have a
> number of systems that are peers in an NTP network. All of them are
> using the same userland NTP daemon. However, if the rate of change that
> corrections are applied is different in half of them, you will have
> problems getting all the systems to converge together. 

Would this not be true already, because the convergence
of Linux system suddenly became a lot slower in 2.6.19?

Damned if we do, damned if we don't - except the new
behaviour introduced by your patches is nicer.

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