>Re: lot of rebooting with manual fsck and the like: Been there, done that >while debugging XFree86 4.0 on the Lombard. I'd try to get emergency sync >going with SysRq, failing that I'd try to get as much info out of the >crash by using serial console and hooking a panic() workalike to some >trigger (special key if the keyboard interrupt is still working; do >Powermacs have some sort of NMI interrupt switch??).
There is but it's not a real NMI, it is masked by cli(). I've been thinking about implementing a soft-disable mecanism based on the OpenPIC interrupt priority mecanism, but it's tricky and would slow things down significantly. Can still be a useful debugging mecanism though as it would allow breaking via NMI on cli() lockups and spin deadlocks. Ben.
