[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 #135 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to George Mitchell from comment #134)

Having the kldstat output for this combination would
help identify what module is initially involved in any
crash.

Part of what may be of use is how often you see the
dbuf_evict_thread type of backtrace and what module
the first "instruction pointer  =" references in
such cases (if any). Another would be if new crash
contexts show up that have not been seen before.

So far there is no evidence for how many bugs there
are, given the varying failure-structures that show
up. There could even be the possibility of unreliable
memory or bugs specific to amdgpu_raven_*.ko files (such
as sometimes trashing some memory).

I've yet to induce any failure in the amdgpu_polaris11_*.ko
based amd64 context that I have access to (a ThreadRipper
1950X), although by no means is it a close match to your
context. To my knowledge, you still have the only known
examples of any of the failures.

To some extent, if trying new things leads to new forms
of failure for you, it potentially gives me new sequences
to try on the ThreadRipper 1950X. How (un)likely that is
to yield useful information I do not know. (My hope to
also try on aarch64, where I've access to a serial
console, did not pan out.)

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.