[Bug 251736] [panic] memcpy_erms general protection fault on AMD Zen 3 (Ryzen 5000 series)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251736

--- Comment #7 from Greg V <greg at unrelenting.technology> ---
(In reply to Konstantin Belousov from comment #5)

Yeah 0x1020004000200a0 is in rdi at the abd_copy_off_cb frame.

Also I've seen now similar panics with memcpy_std, a completely different panic
(not memcpy) in zfs when testing erms with the patch above…

So this is probably actually ZFS's fault.
Now trying a couple months old kernel, zfs scrub is working fine with ERMS on.
Sorry for the false alarm I guess.
But this did not happen before the CPU upgrade?? Weird.

> are you running with newest microcode for the cpu?

The CPU is so new, idk if any microcode updates were released yet.
But I am running the latest firmware for the mainboard, literally 2 days old
"BIOS".

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