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 > Does the same happen if you don't use a driver domain and run the > backend in dom0? No, it does not. On dom0 everything is set up correctly. Here the final part of xl -vvv devd -F executed on dom0, which is different from the execution on guest0 libxl: debug: libxl_event.c:1052:devstate_callback: backend /local/domain/0/backend/vif/1/0/state wanted state 2 ok libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch w=0xaaaaca342470 wpath=/local/domain/0/backend/vif/1/0/state token=1/2: deregister slotnum=1 libxl: debug: libxl_device.c:1090:device_backend_callback: Domain 1:calling device_backend_cleanup libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch w=0xaaaaca342470: deregister unregistered libxl: debug: libxl_device.c:1191:device_hotplug: Domain 1:calling hotplug script: /etc/xen/scripts/vif-bridge online libxl: debug: libxl_device.c:1192:device_hotplug: Domain 1:extra args: libxl: debug: libxl_device.c:1198:device_hotplug: Domain 1: type_if=vif libxl: debug: libxl_device.c:1200:device_hotplug: Domain 1:env: libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: script: /etc/xen/scripts/vif-bridge libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: XENBUS_TYPE: vif libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: XENBUS_PATH: backend/vif/1/0 libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: XENBUS_BASE_PATH: backend libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: netdev: libxl: debug: libxl_device.c:1207:device_hotplug: Domain 1: vif: vif1.0 libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to execute: /etc/xen/scripts/vif-bridge online > > Regards, Roger. Cheers, Andrea.
