[libvirt] [PATCH] Use 'qemu-system-i386' as binary instead of 'qemu'.

[Daniel P. Berrange]

On Thu, Sep 13, 2012 at 03:51:01PM +0100, Richard W.M. Jones wrote:
> I have added the attached patch to Fedora because Fedora (only?)
> renames 'qemu' to 'qemu-system-i386'.  As a result of this, on 32 bit
> Fedora would run 'qemu-system-x86_64 [...] -cpu qemu32'.
> 
> In fact this caused no issues (I originally added the patch because
> I suspected this was a cause of RHBZ#857026, but that doesn't
> appear to be the case).  But if we're going to package qemu-system-i386
> we might as well run it.  The alternative would be to delete that
> binary altogether if it does nothing useful ...
> 
> Rich.
> 
> -- 
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> virt-p2v converts physical machines to virtual machines.  Boot with a
> live CD or over the network (PXE) and turn machines into Xen guests.
> http://et.redhat.com/~rjones/virt-p2v

> >From 37865f1dead1fac2ee34af48f96d19d686296e04 Mon Sep 17 00:00:00 2001
> From: "Richard W.M. Jones" <rjones at redhat.com>
> Date: Thu, 13 Sep 2012 14:37:22 +0100
> Subject: [PATCH] Use 'qemu-system-i386' as binary instead of 'qemu'.
> 
> ---
>  src/qemu/qemu_capabilities.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
> index af3b0b2..179b3d2 100644
> --- a/src/qemu/qemu_capabilities.c
> +++ b/src/qemu/qemu_capabilities.c
> @@ -244,8 +244,8 @@ static const struct qemu_feature_flags const arch_info_x86_64_flags [] = {
>  
>  /* The archicture tables for supported QEMU archs */
>  static const struct qemu_arch_info const arch_info_hvm[] = {
> -    {  "i686",   32, NULL, "qemu",
> -       "qemu-system-x86_64", arch_info_i686_flags, 4 },
> +    {  "i686",   32, NULL, "qemu-system-i386",
> +       NULL, arch_info_i686_flags, 4 },
>      {  "x86_64", 64, NULL, "qemu-system-x86_64",
>         NULL, arch_info_x86_64_flags, 2 },
>      {  "arm",    32, NULL, "qemu-system-arm",    NULL, NULL, 0 },

I was going to ACK this, but then it would break libvirt usage with many
older QEMU versions. Since we generally try to support historic versions
I'd rather we hold off. I've got a more complete fix which looks for
the new name, and falls back to the old name.

https://www.redhat.com/archives/libvir-list/2012-September/msg00662.html


Daniel
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