[Bug 235582] rpc_svc_gss / nfsd kernel panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235582

--- Comment #16 from Peter Eriksson <peter.x.eriksson at liu.se> ---
I agree that the debug printout stuff is not the problem here.

We are going to try out your second patch on our production servers this week.
(Just had one of the servers (without your patch) crash and reboot again
twice).

Thankfully we found a way to speed up the mounting of 20k zfs filesystems
massively so a reboot now takes about 5 minutes instead of 40+ minutes... (A
coworker wrote a script that does the ZFS mounts in parallell instead of
sequentially - there are room for even more speed improvements though :-)

Anyway - a question about a potential workaround:

Would limiting the number of NFSD thread with "-n 1" "mask" this problem? 
Our servers have 32 cpu "cores" so nfsd tries to start up 256 kernel threads
which I'm guessing will improve the chance of the bug to be triggered.

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