Adding qemu disable pci devices patch to Fedora Xen

[Pasi Kärkkäinen]

Hello.

Would it be possible to add Qemu "disable pci devices" patch to Fedora Xen
packages? It allows HVM domains (or more specifically PV drivers running
in HVM domains) to hide qemu emulated disk/network devices in a sane way to
prevent possible corruption and other problems when both the PV devices and Qemu
emulated devices are present at the same time..  

It's mostly needed for Xen gplpv drivers by James Harper. The same
code/feature is also being used by Citrix/Xensource commercial Windows PV
drivers. 

The patch has been in xen-unstable (3.4) for a while already without
problems. 

Patch against Xen 3.3.1 (by James Harper):
http://www.meadowcourt.org/downloads/qemu_disable_patches.zip

Discussion about it on xen-devel:
http://lists.xensource.com/archives/html/xen-devel/2009-01/msg00705.html

This would be a needed feature soon when HVM domains start working ok with
pv_ops dom0 :) 

-- Pasi

[Daniel P. Berrange]

On Thu, Feb 26, 2009 at 09:12:35PM +0200, Pasi K?rkk?inen wrote:
>  Hello.
>  
>  Would it be possible to add Qemu "disable pci devices" patch to Fedora Xen
>  packages? It allows HVM domains (or more specifically PV drivers running
>  in HVM domains) to hide qemu emulated disk/network devices in a sane way to
>  prevent possible corruption and other problems when both the PV devices and Qemu
>  emulated devices are present at the same time..  
>  
>  It's mostly needed for Xen gplpv drivers by James Harper. The same
>  code/feature is also being used by Citrix/Xensource commercial Windows PV
>  drivers. 
>  
>  The patch has been in xen-unstable (3.4) for a while already without
>  problems.  
Since its merged in xen-unstable & feedback seems positive, I've  no
objections to it being added to the xen RPM in F11. 


Daniel
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[Pasi Kärkkäinen]

On Thu, Feb 26, 2009 at 08:27:14PM +0000, Daniel P. Berrange wrote:
>  On Thu, Feb 26, 2009 at 09:12:35PM +0200, Pasi K?rkk?inen wrote:
>  > Hello.
>  > 
>  > Would it be possible to add Qemu "disable pci devices" patch to Fedora
> Xen
>  > packages? It allows HVM domains (or more specifically PV drivers running
>  > in HVM domains) to hide qemu emulated disk/network devices in a sane way to
>  > prevent possible corruption and other problems when both the PV devices and Qemu
>  > emulated devices are present at the same time..  
>  > 
>  > It's mostly needed for Xen gplpv drivers by James Harper. The same
>  > code/feature is also being used by Citrix/Xensource commercial Windows PV
>  > drivers. 
>  > 
>  > The patch has been in xen-unstable (3.4) for a while already without
>  > problems. 
>  
>  Since its merged in xen-unstable & feedback seems positive, I've  no
>  objections to it being added to the xen RPM in F11. 
>   
Ok, good.

Gerd: Could you apply that patch for the next Fedora Xen build? 

-- Pasi

[Gerd Hoffmann]

Pasi Kärkkäinen wrote:
>  Gerd: Could you apply that patch for the next Fedora Xen build? 
Already done.
Commit message well hidden in the mass rebuild email flood ;)

cheers,
  Gerd

[Pasi Kärkkäinen]

On Mon, Mar 02, 2009 at 11:53:10AM +0100, Gerd Hoffmann wrote:
>  Pasi Kärkkäinen wrote:
>  > Gerd: Could you apply that patch for the next Fedora Xen build? 
>  
>  Already done.
>  Commit message well hidden in the mass rebuild email flood ;)
>   
Oh, nice, that was fast :)

Thanks!

-- Pasi

[Pasi Kärkkäinen]

On Mon, Mar 02, 2009 at 01:24:26PM +0200, Pasi Kärkkäinen wrote:
>  On Mon, Mar 02, 2009 at 11:53:10AM +0100, Gerd Hoffmann wrote:
>  > Pasi Kärkkäinen wrote:
>  > > Gerd: Could you apply that patch for the next Fedora Xen build? 
>  > 
>  > Already done.
>  > Commit message well hidden in the mass rebuild email flood ;)
>  > 
>  
>  Oh, nice, that was fast :)
>  
>  Thanks!
>   
* Sat Feb 28 2009 Gerd Hoffmann <kraxel(a)redhat.com&gt; - 3.3.1-6
- fix xenstored crash.
- backport qemu-unplug patch.

So I guess it's that one..

-- Pasi

[Gerd Hoffmann]

Pasi Kärkkäinen wrote:
>  * Sat Feb 28 2009 Gerd Hoffmann <kraxel(a)redhat.com&gt; - 3.3.1-6
>  - fix xenstored crash.
>  - backport qemu-unplug patch. 
Yep.

cheers,
  Gerd