Xen devel - Mar 2012 - BUG in Xen4's HVM LAPIC?

Hi

It seems that the Xen4.1''s HVM LAPIC clock for HVM fails to function
normally, the guest OS cannot receive interrupts and Linux chooses to use
PIT based TSC timer.  Is there any change from Xen3.x with respect of this?
Thanks

- Zhefu


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On Mon, Mar 05, 2012 at 12:22:32PM -0500, zhefu jiang
wrote:
> Hi
> 
> It seems that the Xen4.1''s HVM LAPIC clock for HVM fails to
function
> normally, the guest OS cannot receive interrupts and Linux chooses to use
> PIT based TSC timer.  Is there any change from Xen3.x with respect of this?
Huh? Can you be more specific? What kind of guest? 
> Thanks
> 
> - Zhefu
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

Thanks for reply, I found out that it was due to the TSC Deadline mode. The
system was ok after I disabled it from xen''s boot parameter.

2012/3/13 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> On Mon, Mar 05, 2012 at 12:22:32PM -0500, zhefu jiang wrote:
> > Hi
> >
> > It seems that the Xen4.1''s HVM LAPIC clock for HVM fails to
function
> > normally, the guest OS cannot receive interrupts and Linux chooses to
use
> > PIT based TSC timer.  Is there any change from Xen3.x with respect of
> this?
>
> Huh? Can you be more specific? What kind of guest?
> > Thanks
> >
> > - Zhefu
>
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>

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