[Bug 250667] Frequent Kernel panic for spin lock on TrueNAS (FreeBSD 12.2)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250667

--- Comment #3 from Seb <s.d.j.belcher at gmail.com> ---
Turns out TrueNAS does not output crash-dumps in the way I was expecting, I've
has another 9 kernel panics since my last comment but all produced only
text-dumps.  I *think* I've got it setup to do a core-dump next crash now using
sysctl to override the text-dump pending flag... so hopefully will have a
vmcore for you soon. 

The panic string has been different the last few times:

Dump header from device: /dev/ada1p3
  Architecture: amd64
  Architecture Version: 4
  Dump Length: 1751040
  Blocksize: 512
  Compression: none
  Dumptime: Sun Nov  1 08:33:26 2020
  Hostname: nas.lan
  Magic: FreeBSD Text Dump
  Version String: FreeBSD 12.2-RC3 7c4ec6ff02c(HEAD) TRUENAS
  Panic String: Bad tailq NEXT(0xffffffff82134d98->tqh_last) != NULL
  Dump Parity: 3497888606
  Bounds: 3
  Dump Status: good

Another TrueNAS user is reporting similar issues and believes it may be related
to the Intel 10Gb 'ix' drivers. Is that a possibility?

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