Re: [Xen-devel] [PATCH] libxl: Don't insert PCI device into xenstore for HVM guests

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, May 29, 2015 at 10:43:08AM +0100, Ross Lagerwall wrote:
> On 05/29/2015 10:41 AM, Wei Liu wrote:
> >On Fri, May 29, 2015 at 08:59:45AM +0100, Ross Lagerwall wrote:
> >>When doing passthrough of a PCI device for an HVM guest, don't insert
> >>the device into xenstore, otherwise pciback attempts to use it which
> >>conflicts with QEMU.
> >>
> >>This manifests itself such that the first time a device is passed to a
> >>domain, it succeeds. Subsequent attempts fail unless the device is
> >>unbound from pciback or the machine rebooted.
> >>
> >
> >The commit message looks sensible to me. However this might break
> >qemu-trad PCI passthrough if I'm not mistaken. What QEMU version are you
> >using?  Upstream or trad? Have you tested both of them?
> >
> 
> qemu-trad. I haven't tested with qemu-upstream.
> 

I don't quite get this. Doesn't qemu-trad depends on those xenstore
nodes for PCI passthrough information?  What did I miss?

Wei.

> -- 
> Ross Lagerwall

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