Re: [Xen-devel] Xen pciback not working: "address space collision: [mem ...] conflicts with System RAM [mem ...]"

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Aug 28, 2013 at 06:44:50PM +0200, Andrea Brugiolo wrote:
> On Wed, Aug 28, 2013 at 11:45:01AM -0400, Konrad Rzeszutek Wilk wrote:
> > On Tue, Aug 27, 2013 at 11:03:02PM +0200, Andrea Brugiolo wrote:
> > > On Fri, Aug 23, 2013 at 02:54:30PM -0400, Konrad Rzeszutek Wilk wrote:
> > > > > > Awaiting your response with the usage of 'xl'.
> > > > > 
> > > > > Now I am using `xl' and the
> > > > > 
> > > > >     e820_host  =   1
> > > > > 
> > > > > option in the domU configuration but I get the same result as before
> > > > > and no device attached:
> > > > 
> > > > And this is with Xen 4.2 I presume?
> > > 
> > > No, Xen 4.1 (Debian 4.1.4-3+deb7u1 Xen hypervisor and libs)
> > 
> > OK, Xen 4.1 did not have the code to handle the e820_host so hence the
> > reason for this not working :-(.
> > 
> > You will need to upgrade to Xen 4.2 at least. I don't know how that
> > is done under Debian.
> 
> Argh... the 4.2 hypervisor is still in the Debian unstable release so
> I am not sure about how I could put that into production without
> relevant breaks.
> 
> As a last resort, would you suggest tecniques other than pciback to
> delegate a device to a guest in Xen 4.1?

The other option is to limit the amount of memory the guest will use
from 16GB to say 2GB. That would work as well.
> 
> Thank you very much for your attention and the time you dedicated do
> this issue

Sure thing. Sadly the patch did not make Xen 4.1 hence the need to use
a more modern version of Xen stack.
> 
> Andrea

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