I found my first GPF in FreeBSD tonight. I was trying to mount a floppy drive so
I could copy files from one system to another, but I forgot to insert the floppy.
First it timed out. Fair enough. There's no floppy there.
So I insert the floppy and try again. WOW!
isa_dmastart: channel 2 busy
Fatal trap 9: general protection fault while in kernel mode
And I could reproduce it. UGLY.
I'll track this down sometime and find out what's really going on there.