>
> Description of problem:
> Guest get 'Call Trace' when loading module "virtio_console" and unloading
> it frequently
>
>
> Version-Release number of selected component (if applicable):
> Guest
> kernel-4.18.0-167.el8.x86_64
> seabios-bin-1.11.1-4.module+el8.1.0+4066+0f1aadab.noarch
From: Andrew Melnychenko
If there is a lot(more then 16) of virtio-console devices
or virtio_console module is reloaded
- buffers 'vtermnos' and 'cons_ops' are overflowed.
In older kernels it overruns spinlock which leads to kernel freezing:
https://bugzilla.redhat.com/show_bug.cgi?id=1786239
