[fedora-virt] how can i verify that HW extensions are being used?

Mike Hinz mike.hinz at yr20.com
Thu Apr 16 19:14:31 UTC 2009

Guys, just to be clear what my issue is/was.  Once I got my F11 beta guest
installed, it ran just fine and at very near native speed.  In fact, I've
had it up and running for several days now.  The issue is ONLY with the
installer and installation.  That goes shockingly slow!  It also acts
differently than a normal Fedora 11 beta install on physical HW in that it
asks you for some network adapter info and it appears to me, to install
entirely from the network as the lights on lab switch goes nuts as does the
network activity light on my server AND I see essentially zero activity on
the DVD drive on the server.  I'm convinced therefore that something is just
wrong with the way Fedora 11 installs, at least on the Fedora 11 beta
physical server.  

Mark, do you want me to still file a bug on this?


Mike Hinz
1718 Fry Road, Suite 440
Houston, TX  77084
mike.hinz at yr20.com
832-225-1293 (o)
713-594-3095 (m)
832-550-2657 (f)

-----Original Message-----
From: fedora-virt-bounces at redhat.com [mailto:fedora-virt-bounces at redhat.com]
On Behalf Of Robert P. J. Day
Sent: Thursday, April 16, 2009 2:08 PM
To: Mark McLoughlin
Cc: Fedora Virtualization Mailing List
Subject: Re: [fedora-virt] how can i verify that HW extensions are being

On Thu, 16 Apr 2009, Mark McLoughlin wrote:

> On Thu, 2009-04-16 at 14:00 -0400, Robert P. J. Day wrote:
> >
> >
> >
> > In that case, you can check that:
> >
> >     * the modules are correctly loaded lsmod|grep kvm
> >     * you don't have a "KVM: disabled by BIOS" line in the output of
> >     * /dev/kvm exists and you have the correct rights to use it
> >
> > that last point seems fairly adamant that your account *needs*
> > access to /dev/kvm so, if that's true, i *shouldn't* have had HW
> > support until i did all of the above.  i don't see how you could
> > shortcut any of the above.
> That information is only relevant if you're installing kvm yourself
> and running e.g. qemu-kvm. As I said, on Fedora we want it to "just
> work".
> virt-manager connects to the system libvirtd and it is that which
> spawns qemu-kvm, so it is spawned it as root currently. So, you
> don't need to modify the permissions on /dev/kvm.

  ok, i take it all back.  i created a totally generic user account,
"guest", didn't do anything special to it, logged in as guest, fired
up VMM and it seems to be as fast as my original account.  i'm
baffled.  all i can guess is that, somehow, i failed to activate HW
virt extensions before, when it was sooooooooo slow.

  here's the relevant snippet from the guest log file:

[Thu, 16 Apr 2009 14:55:27 virt-manager 15168] DEBUG (create:1438)
Creating a VM f11g
  Type: kvm,hvm
  UUID: 733e41a4-fd1a-d640-2f9b-ce5883fcc00a
  Install Source: /dev/sr0
  OS: linux:fedora11
  Kernel args: None
  Memory: 2048
  Max Memory: 2048
  # VCPUs: 2
  Filesize: 20.0

VM "f11g", "g" meaning guest so it's clearly working, and clearly
seeing hvm extensions.

  sorry for all the noise, i guess it really just works without
dicking around with udev and so on.

  argh.  i need a beer.

Robert P. J. Day                               Waterloo, Ontario, CANADA

        Linux Consulting, Training and Annoying Kernel Pedantry.

Web page:                                          http://crashcourse.ca
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