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Date:      Thu, 26 Sep 2019 10:08:05 -0600
From:      Alan Somers <asomers@freebsd.org>
To:        FreeBSD <freebsd-stable@freebsd.org>
Subject:   panic: unregistered use of FPU in kernel
Message-ID:  <CAOtMX2g8mQNnMCy4e8S%2BQH58pFve37Gjwy%2BR4iG0e7%2B5whZ8bQ@mail.gmail.com>

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The 12.1-PRERELEASE (FreeBSD-12.1-PRERELEASE-amd64-20190913-r352266.qcow2)
VM image instapanics with the error message:

panic: Unregistered use of FPU in kernel
stack trace:
...
ffs_ckhash_ch
bufdone
g_io_deliver
g_io_deliver
g_io_deliver
g_disk_done
vtblk_vq_intr
ithread_loop
fork_exit
...

I see a similar panic on HEAD snapshots, reproducible as far back as the
June-7 snapshot (the oldest one on the ftp server).  I'll continue
investigating.
-Alan



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