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Hi Folks,

Here's an updated version of the kvm paravirt clock infrastructure. Some
of the issues you all raised were addressed, some were not. This work
basically focus on general issues / clocksource, so don't expect to see
much new things here in the clock events area.

For this, I intend to start implementing avi's idea of using a dedicated
 irq chip other than the apic, as nobody seem to have voiced any strong
opposition.

As for the HPET vs clockevents, my solution is as follows: I will
implement the clockevents, as it is already on its way, and whoever
wants, can do an hpet implementation ;-)

Thinking about this, this patch now makes clocksource and clockevents
really decoupled from a functionality pov. You can now turn one of them
off by a kernel parameter.

There were some bugs in my previous clocksource being masked by a
userspace call to settimeofday() in my distribution image
initialization, so the code here fixes it.

Also, With all methods I've tried to keep the wallclock of guest and
host n'sync, I experienced a little difference in all situations. The
one you'll see in this patch is not the most beautiful thing in the
world, but worked quite well, even in situations in which the nsec
remainder is quite small.

I'll keep up a git tree for it at
git://git.kernel.org/pub/scm/linux/kernel/git/glommer/kvmclock.git, and
for this version, there's also a one big patch at
http://glommer.net/kvm-clock-one-big-patch-v2.patch

It's also below, for your appreciation.
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