RE: [Xen-devel] comprehensive documentation of clock-related options for HVM guests

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

I agree it is confusing.  There is no good default.  Your
best plan is to specify timer_mode=2 in the config file
for hvm x86_64 linux guests.

I think the defaults in XendConfig.py are to ensure that
old saved guests don't get confused by a different default.

> -----Original Message-----
> From: Guillaume Rousse [mailto:Guillaume.Rousse@xxxxxxxx]
> Sent: Monday, February 16, 2009 3:40 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] comprehensive documentation of clock-related
> options for HVM guests
> 
> 
> Hello list.
> 
> Despite using ntp, we're facing heavy clock skews on our HVM guests, 
> which happen to be almost all x86_64 linux. I've been 
> browsing the list 
> archive, I found reference to two different xen guest 
> configuration options:
> - timer_mode
> - hpet
> 
> However, I couldn't find neither reference documentation, neither on 
> their default values.
> 
> According to this tread, the default for timer_mode was 
> changed in some 
> part of the source tree from 0 to 1:
> http://lists.xensource.com/archives/html/xen-devel/2008-10/msg
00261.html

But according to this one, there was a discussion for changing 
timer_mode from 0 to 2, and hpet from 0 to 1:
http://lists.xensource.com/archives/html/xen-devel/2008-06/msg00095.html

And according to XendConfig.py code (3.3.1), the default value for both 
of them is actually 0...

This is a bit confusing :(
-- 
BOFH excuse #243:

The computer fleetly, mouse and all.

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