Re: Network driver domain broken

[Andrea Stevanato <andrea.stevanato@xxxxxxxxxxxxxxx>]

On 3/7/2022 3:56 PM, Jan Beulich wrote:
> On 07.03.2022 15:52, Roger Pau Monné wrote:
>> On Mon, Mar 07, 2022 at 03:20:22PM +0100, 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
>>
>> Are you perhaps using some kind flask/xsm policy different from the
>> defaults?
> 
> Or SILO mode.

It turns out that this was the problem. I changed it to FLASK, added
flask=late to the bootloader cmd and now it works fine (at least for
now).

> Jan

Forgive me for bothering you so much, as soon as I can I will update
the wiki with all the information that I have discovered!
Thank you all!

Cheers,
Andrea