Kernel crash during video transcoding

[Hans Petter Selasky]

Hi,

On 2020-08-10 12:59, Alexandre Levy wrote:
> Looking at the code, the error happens during the call to VM_OBJECT_WLOCK
> (memory page locking for write ?) in the intel_freebsd.c (see [1] below).
> I'm out for a few days but I'll try to dig more into it when I'm back next
> weekend although I have no experience in the drm-devel-kmod codebase. In
> the meantime if you have any suggestions on debugging this further I'm
> happy to follow them.

The problem is likely that the vm_obj is NULL.

I think I recall that this function is special and can only be called 
from a certain context, unlike in Linux. Will need the full backtrace 
with line numbers in order to debug this.

--HPS