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Re: Network driver domain broken
- To: Andrea Stevanato <andrea.stevanato@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- From: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>
- Date: Mon, 7 Mar 2022 14:50:55 +0000
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- Cc: Jason Andryuk <jandryuk@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "wl@xxxxxxx" <wl@xxxxxxx>, Anthony Perard <anthony.perard@xxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
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- Thread-topic: Network driver domain broken
On 07/03/2022 14:43, Andrea Stevanato wrote:
> On 3/7/2022 3:36 PM, Jan Beulich wrote:
>> On 07.03.2022 15:20, Andrea Stevanato wrote:
>>> On 3/7/2022 12:46 PM, Roger Pau Monné wrote:
>>>> On Mon, Mar 07, 2022 at 12:39:22PM +0100, Andrea Stevanato wrote:
>>>>> /local/domain/2 = "" (n0,r2)
>>>>> /local/domain/2/vm = "/vm/f6dca20a-54bb-43af-9a62-67c55cb75708" (n0,r2)
>>>>> /local/domain/2/name = "guest1" (n0,r2)
>>>>> /local/domain/2/cpu = "" (n0,r2)
>>>>> /local/domain/2/cpu/0 = "" (n0,r2)
>>>>> /local/domain/2/cpu/0/availability = "online" (n0,r2)
>>>>> /local/domain/2/cpu/1 = "" (n0,r2)
>>>>> /local/domain/2/cpu/1/availability = "online" (n0,r2)
>>>>> /local/domain/2/memory = "" (n0,r2)
>>>>> /local/domain/2/memory/static-max = "1048576" (n0,r2)
>>>>> /local/domain/2/memory/target = "1048577" (n0,r2)
>>>>> /local/domain/2/memory/videoram = "-1" (n0,r2)
>>>>> /local/domain/2/device = "" (n0,r2)
>>>>> /local/domain/2/device/suspend = "" (n0,r2)
>>>>> /local/domain/2/device/suspend/event-channel = "" (n2)
>>>>> /local/domain/2/device/vif = "" (n0,r2)
>>>>> /local/domain/2/device/vif/0 = "" (n2,r1)
>>>>> /local/domain/2/device/vif/0/backend = "/local/domain/1/backend/vif/2/0"
>>>>> (n2,r1)
>>>>> /local/domain/2/device/vif/0/backend-id = "1" (n2,r1)
>>>>> /local/domain/2/device/vif/0/state = "6" (n2,r1)
>>>>> /local/domain/2/device/vif/0/handle = "0" (n2,r1)
>>>>> /local/domain/2/device/vif/0/mac = "00:16:3e:07:df:91" (n2,r1)
>>>>> /local/domain/2/device/vif/0/xdp-headroom = "0" (n2,r1)
>>>>> /local/domain/2/control = "" (n0,r2)
>>>>> /local/domain/2/control/shutdown = "" (n2)
>>>>> /local/domain/2/control/feature-poweroff = "1" (n2)
>>>>> /local/domain/2/control/feature-reboot = "1" (n2)
>>>>> /local/domain/2/control/feature-suspend = "" (n2)
>>>>> /local/domain/2/control/sysrq = "" (n2)
>>>>> /local/domain/2/control/platform-feature-multiprocessor-suspend = "1"
>>>>> (n0,r2)
>>>>> /local/domain/2/control/platform-feature-xs_reset_watches = "1" (n0,r2)
>>>>> /local/domain/2/data = "" (n2)
>>>>> /local/domain/2/drivers = "" (n2)
>>>>> /local/domain/2/feature = "" (n2)
>>>>> /local/domain/2/attr = "" (n2)
>>>>> /local/domain/2/error = "" (n2)
>>>>> /local/domain/2/error/device = "" (n2)
>>>>> /local/domain/2/error/device/vif = "" (n2)
>>>>> /local/domain/2/error/device/vif/0 = "" (n2)
>>>>> /local/domain/2/error/device/vif/0/error = "1 allocating event channel"
>>>>> (n2)
>>>> That's the real error. Your guest netfront fails to allocate the event
>>>> channel. Do you get any messages in the guest dmesg after trying to
>>>> attach the network interface?
>>> Just these two lines:
>>>
>>> [ 389.453390] vif vif-0: 1 allocating event channel
>>> [ 389.804135] vif vif-0: 1 allocating event channel
>> Well, these are the error messages, from xenbus_alloc_evtchn().
>> What's a little odd is that the error code is positive, but that's
>> how -EPERM is logged. Is there perhaps a strange or broken XSM
>> policy in use? I ask because evtchn_alloc_unbound() itself
>> wouldn't return -EPERM afaics.
> As you can see I'm pretty new to Xen. Furthermore, it is the first
> time that I heard about XSM, so since I did not change anything I
> do not know what to answer!
Please can you attach the full output of `xl dmesg`, which will help
answer this question.
~Andrew
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