[Bug 267028] kernel panics when booting with both (zfs,ko or vboxnetflt,ko or acpi_wmi.ko) and amdgpu.ko

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267028

--- Comment #339 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Andriy Gapon from comment #314)

Thanks for clearing my muddled thinking about having
a sufficiently known context for hwatchpoint
specification.

Unfortunately, my attempt at using db_hwatchpoint_cmd
to automatically set up the monitoring seems to have
lead to "WARNING !drm_modeset_is_locked . . ." as what
visibly happens on detection --and is not providing
for access to backtraces or such for the code doing
the unexpected modification.

If I did not mess up the db_hwatchpoint_cmd calls,
I doubt that I have enough background knowledge to
figure out what is going on or how to get it to
allow providing the backtrace for the value change.

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