Xen users - Apr 2010 - What happend to /sys/xen and independent_wallclock (Xen 4.0/Linux 2.6.32)

Hi all,

finally I have managed to upgrade to Xen 4.0 (actually it reports Xen
4.1-unstable) and Debian''s Linux kernel 2.6.32-4-xen-amd64. Now I am
wondering what happend to independent_wallclock. There is no more
/sys/xen and sysctl complains

	error: "xen.independent_wallclock" is an unknown key

Does anybody know more about this?

Thanks + best regards,

Stephan



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Mon, 5 Apr 2010 21:35:57 +0200 <au@hcsd.de> wrote:
> Hi all,
> 
> finally I have managed to upgrade to Xen 4.0 (actually it reports Xen
> 4.1-unstable) and Debian''s Linux kernel 2.6.32-4-xen-amd64. Now I
am
> wondering what happend to independent_wallclock. There is no more
> /sys/xen and sysctl complains
> 
> 	error: "xen.independent_wallclock" is an unknown key
I believe this is becasue the kernel is pvops based and the pvops kernels
atleast with the attached kernel configuration does not populate /sys/xen in the
filesystem.

There is files/folders in /proc/xen/ that are populated by the kernel though.



-M
> 
> Does anybody know more about this?
> 
> Thanks + best regards,
> 
> Stephan
> 
 		 	   		  
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xen-users-bounces@lists.xensource.com wrote on 04/05/2010 03:55:00 PM:
> Mike Viau <viaum@sheridanc.on.ca> 
> Sent by: xen-users-bounces@lists.xensource.com
> 
> 04/05/2010 03:55 PM
> 
> To
> 
> <xen-users@lists.xensource.com>
> 
> cc
> 
> Subject
> 
> RE: [Xen-users] What happend to /sys/xen and independent_wallclock 
> (Xen 4.0/Linux 2.6.32)
> 
> Mon, 5 Apr 2010 21:35:57 +0200 <au@hcsd.de> wrote:
> 
> > Hi all,
> > 
> > finally I have managed to upgrade to Xen 4.0 (actually it reports Xen
> > 4.1-unstable) and Debian''s Linux kernel 2.6.32-4-xen-amd64.
Now I am
> > wondering what happend to independent_wallclock. There is no more
> > /sys/xen and sysctl complains
> > 
> > error: "xen.independent_wallclock" is an unknown key
> 
> I believe this is becasue the kernel is pvops based and the pvops 
> kernels atleast with the attached kernel configuration does not 
> populate /sys/xen in the filesystem.
> 
> There is files/folders in /proc/xen/ that are populated by the kernel 
though.

Uh, oh...  I need my domUs to have clocks independent from dom0.  Is this 
perhaps the default behavior in pv_ops (fingers crossed)?  Otherwise, I 
need to figure out how to force this behavior pronto.

-Mike

---
Michael D Labriola
Electric Boat
mlabriol@gdeb.com
401-848-8871 (desk)
401-848-8513 (lab)
401-316-9844 (cell)



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On 04/05/2010 03:05 PM, Michael D Labriola wrote:
> Uh, oh...  I need my domUs to have clocks independent from dom0.  Is this
> perhaps the default behavior in pv_ops (fingers crossed)?  Otherwise, I
> need to figure out how to force this behavior pronto.
>    
Yes, it is.   They''ll default to the host system time at boot, but then
you can adjust them independently.

     J

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