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Re: [Xen-devel] Time in Xen

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Time in Xen
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Fri, 17 Oct 2003 16:31:27 +0100
Cc: Nicolas Bougues <nbougues-listes@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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> > By RTC, you mean the hardware RTC ? Doesn't xen maintain a system time
> > on its own ?
> Since domain 0 can't currently set Xen's syetm time, using the RTC is
> the only way to get a stable (crystal-based) timebase.
> > As long as xen system time is settable via a domain 0 user tool
> > (ntp-alike), I don't really care about the hardware RTC.
> Tracking the RTC is a nice default --- if DOM0 is running ntp then we
> can track updates from DOM0 instead. This really shouldn't be that
> hard to implement.

Hmmm.... I've taken a thorough look at the code. Not pleasant :-(

It actually needs a fair bit of fixing up. It'll be my first thing to
do when I get back from presenting Xen at SOSP, at the end of next

 -- Keir

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