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Subject: [Bug 224479] kernel panic in reboot+swapoff sys call
Date: Wed, 03 Jan 2018 03:48:28 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224479

--- Comment #25 from ota@j.email.ne.jp ---
Isn't this problem because "umount" happens before "swapoff"?

I also use NFS swapfiles from time to time and when I forget to swapoff such
files before shutdown, kernel panics, too.

# mount -t nfs xxx:/yyy /mnt/nfs
# dd if=3D/dev/zero of=3D/mnt/nfs/swap bs=3D1M seek=3D999
# swapon /mnt/ntfs/swap
# --- use swap....
# i.e. mount -t tmpfs tmp /mnt/tmpfs; dd if=3D/dev/zero of=3D/mnt/tmpfs/fill
# shutdown -p now

I'm not sure what kinds of side effects will happen if we "swapoff" before
"umount", though...

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