Date: Thu, 18 Jan 2001 08:00:27 -0800 From: Julian Elischer <julian@elischer.org> To: Tor.Egge@fast.no Cc: sos@freebsd.dk, jasone@canonware.com, current@FreeBSD.ORG Subject: Re: Debugging SMP instability (was Re: HEADS-UP: await/asleep removal imminent) Message-ID: <3A67131B.8C50EE00@elischer.org> References: <200101171935.UAA25627@freebsd.dk> <200101180602.HAA11429@midten.fast.no>
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Tor.Egge@fast.no wrote:
>
> > Again I'll offer to run any and all code or patches to -current you
> > guys can come up with, but I simply dont have the time to sit down
> > and analyze into details what you have been doing...
>
> The enclosed patch implements a virtual NMI pushbutton by programming
> the IOAPIC to deliver an NMI when sio1 generates an interrupt.
>
> DDB should be defined in the kernel config file.
>
> getty should not run on ttyd1 when this patch is applied.
>
> A serial console on sio0 is recommended.
>
> If you still cannot break into the kernel debugger when the machine
> locks up then a rogue device is probably blocking the system
> (or the debugger is trying to obtain a mutex held by somebody else)
>
> - Tor Egge
cool.
What are the instructions for using this?
should something have sio1 open?
can a paperclip be used to generat the interupt by connecting pins 2 and 3?
etc.
--
__--_|\ Julian Elischer
/ \ julian@elischer.org
( OZ ) World tour 2000
---> X_.---._/ from Perth, presently in: Budapest
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