Hi,
When I try to unbind a network interface from hv_netvsc and bind it to
uio_hv_generic, once in a while I get the following kernel panic (please
note the first two lines: it seems as uio_hv_generic is registered
before the VF bound to hv_netvsc is unregistered):
[Jun 3 09:04] hv_vmbus: registering driver uio_hv_generic
[ +0.002215] hv_netvsc 5e089342-8a78-4b76-9729-25c81bd338fc eth2: VF
unregistering: eth5
[ +1.088078] BUG: scheduling while atomic: swapper/8/0/0x00010003
[ +0.000001] BUG: scheduling while atomic: swapper/3/0/0x00010003
[ +0.000001] BUG: scheduling while atomic: swapper/6/0/0x00010003
[ +0.000000] BUG: scheduling while atomic: swapper/7/0/0x00010003
[ +0.000005] Modules linked in:
[ +0.000001] Modules linked in:
[ +0.000001] uio_hv_generic
[ +0.000000] Modules linked in:
[ +0.000000] Modules linked in:
[ +0.000001] uio_hv_generic uio
[ +0.000001] uio
[ +0.000000] uio_hv_generic
[ +0.000000] uio_hv_generic
...
I run kernel 5.10.27, unmodified, besides RT patch v36, on Azure Stack
Edge platform, software version 2105 (2.2.1606.3320).
I perform the bind-unbind using the following script (please note the
comment inline):
net_uuid="f8615163-df3e-46c5-913f-f2d2f965ed0e"
dev_uuid="$(basename "$(readlink "/sys/class/net/eth1/device")")"
modprobe uio_hv_generic
echo "${net_uuid}" > /sys/bus/vmbus/drivers/uio_hv_generic/new_id
printf "%s" "${dev_uuid}" > /sys/bus/vmbus/drivers/hv_netvsc/unbind
### If I insert 'sleep 1' here - all works correctly
printf "%s" "${dev_uuid}" > /sys/bus/vmbus/drivers/uio_hv_generic/bind
Thanks,
Leonid.
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