[Bug 239351] [panic] spin lock held too long under heavy load (net/wireguard affected)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239351

--- Comment #12 from Evilham <contact at evilham.com> ---
Created attachment 206056
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=206056&action=edit
panic_assertion_patch206036.tar.gz

This panic occurred with 13.0-CURRENT r350275+d78b126a34dc(master) +
patch206036  over night; the system was compiling some ports in poudriere for
CURRENT.

I was about to discard it as it being the same as the others, but noticed it
has a different message, namely
panic: Assertion error_ == 0 failed at /freebsd/src/sys/vm/vm_map.c:553

Attached is the dump, backtrace, acttrace and I managed to identify tid and
frame but p other_cpus returned "No symbol "other_cpus" in current context.",
which is probably normal since this is a totally different thing, but I thought
I'd give it a try anyway.

I hope this is useful.

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