Re: [Xen-users] Disabling clock set in PV boot?

[Evan Lavelle <sa212+xen@xxxxxxxxxxx>]

A partial answer, for anyone who comes this way in the future:

> Is there some way to prevent Xen from setting the clock for a PV guest 
> while booting it?
The answer seems to be no. 'hwclock' doesn't work (as you'd expect), and 
 'date' is disabled until some point in the boot sequence which I 
haven't identified. You can't wait till booting has completed to fix the 
date, because by that time you can have thousands of files which have 
been incorrectly stamped.
If you really want a guest with an independent system time, then it 
looks like it has to be hvm. When 'hwclock' is run from rc.sysinit it 
sometimes sets the date to the Dom0 date (on a cold boot?), and 
sometimes sets it to the last time at which the DomU shut down. This 
isn't a problem, because you can insert a 'date' command immediately 
after 'hwclock' and it works.
You probably also have to turn off SELinux in the guest; the dom0 date 
leaks through somehow during the boot. There are also a few files in 
/proc which occasionally seem to get timestamped 3 days in the future, 
but this is easy enough to fix.
-Evan

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users