Re: [Xen-devel] [Xen-users] substantial shutdown delay for PV guests with PCI -passthrough

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Atom2 writes ("Re: [Xen-devel] [Xen-users] substantial shutdown delay for PV 
guests with PCI -passthrough"):
> Am 21.03.14 19:11, schrieb Ian Jackson:
> > Can you run it again with this, on top of the previous patch, please ?
>
> Sure, the new output of xl -vvv create -F domain is again attached to 
> this e-Mail.

Sorry for the delay replying.  I have been ill :-(.

> <NOTE: at this point a 10s pause happens>
> libxl: error: libxl_device.c:1134:libxl__wait_for_backend_deprecated: Backend 
> /local/domain/0/backend/pci/4/0 not ready (state 7)
> libxl: error: libxl_device.c:1138:libxl__wait_for_backend_deprecated: FE 
> /local/domain/4/device/pci/0 state 6
> libxl: debug: libxl_pci.c:204:libxl__device_pci_remove_xenstore: pci backend 
> at /local/domain/0/backend/pci/4/0 is not ready
> libxl: error: libxl_pci.c:1250:do_pci_remove: xc_domain_irq_permission irq=16

So the backend here is in state 7 (Reconfiguring), but the frontend is
in state 6 (Closed).  I think this is a bug in pciback.

I looked at drivers/xen/xen-pciback/xenbus.c in Linux 3.13 and found
xen_pcibk_frontend_changed which seems to do roughly what I would
expect.

Has this changed at some point ?

Atom, what kernel are you using ?

Thanks,
Ian.

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