Re: [Xen-users] VT-x not found..

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

On Monday 31 May 2010 21:59:24 Jonathan Tripathy wrote:
> Jonathan Tripathy
> I.T. Solutions Manager
> ABPNI Computer Solutions Ltd.
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> On 31/05/10 20:45, Bart Coninckx wrote:
> > On Monday 31 May 2010 21:42:20 Jonathan Tripathy wrote:
> >> On 31/05/10 20:42, Bart Coninckx wrote:
> >>> On Monday 31 May 2010 20:24:15 Jonathan Tripathy wrote:
> >>>> On 31/05/10 19:11, Rudi Ahlers wrote:
> >>>>> On Mon, May 31, 2010 at 8:00 PM, Jonathan Tripathy<jonnyt@xxxxxxxxxxx
> >>>>> <mailto:jonnyt@xxxxxxxxxxx>>   wrote:
> >>>>>
> >>>>>       Hi Everyone,
> >>>>>
> >>>>>       I upgraded my CentOS 5.5 to Xen 3.4.2 using this guide:
> >>>>>
> >>>>> http://www.syntaxtechnology.com/2010/01/upgrade-xen-3-0-on-centos-5-4
> >>>>>-x 86 _64-to-xen-3-4-2/
> >>>>>
> >>>>>       Now, using the new kernel that it gave me, the system doesn't
> >>>>> seem to be able to detect vt-x..
> >>>>>
> >>>>>       In virt-manager, Local Install Media and Network Boot are
> >>>>> greyed out..
> >>>>>
> >>>>>       Any ideas?
> >>>>>
> >>>>>       Thanks
> >>>>>
> >>>>>       _______________________________________________
> >>>>>       Xen-users mailing list
> >>>>>
> >>>>> Xen-users@xxxxxxxxxxxxxxxxxxx<mailto:Xen-users@xxxxxxxxxxxxxxxxxxx>
> >>>>> http://lists.xensource.com/xen-users
> >>>>>
> >>>>>
> >>>>> Doe your CPU acrtually support vt-x?
> >>>>>
> >>>>>
> >>>>> Website: http://www.SoftDux.com
> >>>>> Technical Blog: http://Blog.SoftDux.com
> >>>>> Office: 087 805 9573
> >>>>> Cell: 082 554 7532
> >>>>
> >>>> Yes it does. It worked fine with the orignal version of Xen that came
> >>>> with CentOS 5.5. It's a brand new server opened today from Dell which
> >>>> support Vt-x and Vt-d. Virtualisation technology is enabled in the
> >>>> BIOS
> >>>
> >>> You have the vmx flag in /proc/cpuinfo?
> >>> I suppose you had the VT extension enabled before the migration but
> >>> suppose you fiddled with it, power down your host (like shutdown and
> >>> pull the plug) and power it up again. I experienced this being
> >>> necessary once because simple rebooting after getting out of the BIOS
> >>> did NOT enable VT for real.
> >>>
> >>> B.
> >>
> >> Nope, I don't have that flag in cpuinfo, but I can't understand why....
> >> Is it possible that the kernel upgrade can disable this somehow??
> >>
> >> It's really confusing me
> >
> > I personally think not. Do the power recycle thing and check again. If
> > you're sure it's on in the BIOS. Ow yes, which reminds me, I once had a
> > BIOS where it needed to be enabled on two different spots - I think it
> > was a HP machine.
> 
> Power cycling made no different. I had the plug out for about 2 or 3
> minutes.
> 
> This is really starting to worry me why the vmx flag isn't showing...
> 
> I never checked for the vmx flag in the vanilla install, but since I was
> able to create an HVM guest, I image it would have been there?
> 

I can't imagine this is a result of the kernel being used. Whatever is in 
/proc/cpuinfo is what Linux reads out of the BIOS. Something is wrong there. 

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