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

[Jonathan Tripathy <jonnyt@xxxxxxxxxxx>]

On 31/05/10 21:22, Jonathan Tripathy wrote:
> On 31/05/10 21:23, Bart Coninckx wrote:
> > 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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> > >
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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.
> Hmm I just threw in a Ubuntu live CD there and vmx is showing....
> Something must be dud in that Xen 3.4.2 source that i downloaded...
>
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Ok this is starting to bug me...

I installed Ubuntu 10.04 onto my server. I then spent a couple of hours 
compiling and installing Xen 4.0. Now yet again, vmx has disappeared 
from /proc/cpuinfo!!!!
Xend isn't working correctly, but that's another issue, so I can't 
really test any HVM guests.
Buggy BIOS??

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