[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 #199 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to George Mitchell from comment #198)
(In reply to George Mitchell from comment #196)

For getting the crash dump out of the swap partition
and into /var/crash ( replacing the: ???? ) with
its analysis:

# savecore /var/crash /dev/????
# crashinfo -b 

(I think that last will automatically pick up the latest
saved core. Otherwise add the path to the dump file after
the -b argument.)

See:

man 8 savecore
man 8 crashinfo

Note that /var/crash/ would need to be writable. For
single user mode, you first need to deal with making
it writable as I remember. This gets into your
partitioning and mount point usage and ZFS vs. UFS.
If everything is in one UFS partition, then:

# mount -w /

should be sufficient, as an example.

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