DragonFlyBSD

Fairly repeatable but not consistent crashing

Last two times were when shutting down a qemu instance running on dfly, with nfs being served to the instance from the same machine

Previous two times before that were when doing simple operations within the qemu instance on its nfs mount

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There are some extra kprintf debug statments in there, but they're just from trying (and failing) to see if scsi quirks would get a hard drive recognized