Libguestfs - Mar 2018 - Re: Issue with libguestfs-test-tool on a guest hosted on VMWare ESXi

On Sat, Mar 24, 2018 at 03:08:16PM +0000, Tanmoy Sinha
wrote:
> Even though force_tcg works, I intend not to run it on emulation. Is there
> way I can run it over kvm? The other observation is, without force_tcg if I
> use the machine type as  *pc-i440fx-2.**1*,accel=kvm it works fine. The
> default machine type for my host *pc-i440fx-2.8, *which seems to crib.
I don't know, but this is basically a bug in VMware, so you need
to ask them to fix their nested KVM-on-ESXi use case.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

Thanks will write to VMWare forums.

Btw, is there a way I can change the qemu default machine type? I mean when
I specify *-machine pc *it picks up pc-i440fx-2.8 by default.

Or is it tied to the underlying host hardware?

*$>  *qemu-system-x86_64* -machine help*

Supported machines are:

*pc*                   Standard PC (i440FX + PIIX, 1996) (alias of
pc-i440fx-2.8)

*pc-i440fx-2.8*        Standard PC (i440FX + PIIX, 1996) (default)

pc-i440fx-2.7        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.6        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.5        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.4        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.3        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.2        Standard PC (i440FX + PIIX, 1996)

*pc-i440fx-2.1*        Standard PC (i440FX + PIIX, 1996)
.....

On Sat, 24 Mar 2018 at 20:41 Richard W.M. Jones <rjones@redhat.com> wrote:
> On Sat, Mar 24, 2018 at 03:08:16PM +0000, Tanmoy Sinha wrote:
> > Even though force_tcg works, I intend not to run it on emulation. Is
> there
> > way I can run it over kvm? The other observation is, without force_tcg
> if I
> > use the machine type as  *pc-i440fx-2.**1*,accel=kvm it works fine.
The
> > default machine type for my host *pc-i440fx-2.8, *which seems to crib.
>
> I don't know, but this is basically a bug in VMware, so you need
> to ask them to fix their nested KVM-on-ESXi use case.
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> libguestfs lets you edit virtual machines.  Supports shell scripting,
> bindings from many languages.  http://libguestfs.org
>

On Sat, Mar 24, 2018 at 03:49:24PM +0000, Tanmoy Sinha
wrote:
> Thanks will write to VMWare forums.
> 
> Btw, is there a way I can change the qemu default machine type? I mean when
> I specify *-machine pc *it picks up pc-i440fx-2.8 by default.
qemu maps aliases like 'pc' to some emulated machine type.  You
can see the mapping by doing:

  $ qemu-system-x86_64 -machine \?
> Or is it tied to the underlying host hardware?
No, it's something that qemu emulates and is nothing to do with
the host hardware.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top