[Bug 277671] 14-RELEASE/14-STABLE crash with heavy disk IO on AMD Asus x670e motherboard and Intel i225 (igc) breakage NIC non-functioning

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277671

--- Comment #2 from Cameron <cam@vasteel.io> ---
Finally tried this with a swap partition on an NVMe drive to sidestep the SATA
controller entirely... Still I get no crash dump. I commented the old swap
partition out, added the new one, rebooted (I could have just done
swapoff/swapon, but I was being paranoid/thorough). 

I even ran "dumpdev" on the new one to be sure, swapinfo confirmed the new NVMe
swap partition was only swap device... and yet nothing in /var/crash.

savecore -vC /dev/devpart showed there was no dump.

I'm guessing the system locks up so thoroughly it's unable to even do a kernel
dump. Usually when this happens, the system reboots itself (including the 2
times I tried this) if that detail helps.

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