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xen-devel
Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup
On Mon, Mar 22, 2010 at 03:06:48PM -0600, Nadolski, Ed wrote:
>
>
> > -----Original Message-----
>
> > PCI back is to be used _only_ with PV guests - you on the other
> > hand are running an HVM guest.
> >
> > Per the earlier statement, I would recommend you use the 'pciback'
> > instead of 'pci-stub' or just not compile pciback in and see what
> > happens. Keep in mind: PCI back module is only needed when you want to
> > do PV PCI passthrough, which is not what you are doing.
>
> I'm confused - does that mean pci-stub must be used for device assignment to
> an HVM guest? The VTdHowTo isn't clear on that.
Not per say.
xen-pciback can be used for both PV and HVM.
pci-stub can only be used for HVM guests.
But there seems to be a bug somewhere that when the PCI device is
assigned to pci-stub, pciback tries to seize it and can't find it and
somehow is stuck in a spin-lock. That shouldn't be happening.
Right now I am trying to figure out if we remove from Lukasza system
pciback and only use pci-stub whether he still gets those MFN lookup
errors with his QLogic card. Those are, I believe, a seperate issue from
the pciback spinlock failure.
>
> Is there a way to bind the PCI devices to pci-stub at boot time, like with
> pciback?
No.
> Also, do the 'xm pci-list-assignable-devices' and 'xm pci-list' commands work
> the same for both pciback and pci-stub bindings?
Yes.
>
> It seems odd to have different ways to do bindings for PV and for HVM. For
> example, would I have to switch the bindings if I want to first assign a
> device to a PV guest, then stop the PV guest and re-assign the device to an
> HVM guest?
No if you use 'xen-pciback'. Yes if you use 'pci-stub'.
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- RE: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup, (continued)
- RE: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup, Cui, Dexuan
- [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Łukasz Oleś
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Konrad Rzeszutek Wilk
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Łukasz Oleś
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Konrad Rzeszutek Wilk
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Łukasz Oleś
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Konrad Rzeszutek Wilk
- RE: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Nadolski, Ed
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup,
Konrad Rzeszutek Wilk <=
- RE: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Nadolski, Ed
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Konrad Rzeszutek Wilk
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Sander Eikelenboom
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Łukasz Oleś
- Re: [Xen-devel] Re: [vt-d][xen4-rc6] Hangs on startup, Konrad Rzeszutek Wilk
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