Re: [Xen-users] xen_platform_pci is stuck during load

[Erez Zilber <erezzi.list@xxxxxxxxx>]

On Mon, Mar 7, 2016 at 1:33 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> On Sun, Mar 06, 2016 at 09:18:14PM +0200, Erez Zilber wrote:
>> Hi,
>>
>> I'm running a SUSE 11 sp4 VM over Xen with PV NIC. We use iPXE to boot
>> the VM. During boot, iPXE holds the NIC and when the OS comes up, it
>> signals the hypervisor to reset the NIC so it can be attached to the
>> OS drivers.
>>
>> On a successful boot, the boot log looks like this:
>>
>> [    1.051785] Xen version 4.2.
>> [    1.053635] Hypercall area is 1 pages.
>> [    1.055753] xen-platform-pci 0000:00:03.0: I/O protocol version 1
>> [    1.060436] XENBUS: frontend device/vif/0 Connected
>> [    1.063270] XENBUS: backend /local/domain/0/backend/vif/18463/0 Connected
>> [    1.067032] XENBUS: triggering reconnect on
>> /local/domain/0/backend/vif/18463/0
>> [    1.071909] XENBUS: backend
>> /local/domain/0/backend/vif/18463/0/state Connected
>> [    1.165918] XENBUS: backend /local/domain/0/backend/vif/18463/0/state 
>> Closing
>> [    1.174109] XENBUS: backend /local/domain/0/backend/vif/18463/0/state 
>> Closed
>> [    1.181906] XENBUS: backend
>> /local/domain/0/backend/vif/18463/0/state InitWait
>> [    1.187420] XENBUS: reconnect done on /local/domain/0/backend/vif/18463/0
>> [    1.192649] suspend: event channel 6
>> [    1.198080] Unable to read sysrq code in control/sysrq
>> [    1.208631] blkfront: device/vbd/768: ring-pages=1 nr_ents=32
>>
>> Sometimes, boot fails and then the boot log looks like this:
>>
>> [    1.284151] Xen version 4.2.
>> [    1.286322] Hypercall area is 1 pages.
>> [    1.288947] xen-platform-pci 0000:00:03.0: I/O protocol version 1
>>
>> I can see that the modprobe call (that loads xen_platform_pci) never returns.
>>
>> Is this a known issue? Is there a workaround for this?
>>
>
> I haven't seen similar report in upstream Xen.
>
> It's worth looking at the log of device model (qemu) to see if there is
> anything useful.
>

The VM is running in the cloud, so I don't have access to these logs.

Erez

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