Re: [uml-devel] Lockups with the fixed timer code :/

["Ryan Finnie" <ryan@finnie.org>]

On Tue, Apr 15, 2008 at 12:47 PM, Nix <nix@esperi.org.uk> wrote:
>  > The problem is NTP adjusting the multiplier part of the clock-provided
>  > cycles-to-ns conversion function.  UML pretended to have a ns clock,
>  > with a multiplier of 1.  When NTP adjusted that down in order to slow
>  > down the clock, that became 0, and time stopped.
>
>  ... hang on, wouldn't this only happen if you had NTP running on your
>  guest? (I don't. For that matter, *why* would you have NTP running on
>  your guest? The guest just gets the time of day from the host anyway!)

Yes, ntpd would be required to trigger (or anything that adjusts mult,
but I can't think of anything other than ntpd that would.

(Anyway, this would be my doing; I was the only who reported the
hanging a few weeks ago, and Jeff had been banging on on my test
server, where with a dozen or so guests running concurrently, at least
one of them would trigger within an hour.  And the reason I have ntpd
running on UML guests is I use the same deployment script for both UML
guests and physical dedicated servers.)

RF

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