Let me go straight to th point:
I woke up today and switched on my monitor (I leave my computer on 24hs/day) and had nothing but a tty-like screen with something like this (the transcription my not be accurate......the computer was completely locked and there was nothing i could do besides pushing the reset button, so I copied most of it to a piece of paper and am copying it again in here):
Unable to handle kernel paging request of virtual address 6ba68bd5
Recursive die() failure, output supressed
<0> Kernel panic - not syncing: Fatal exception in interrupt
I have recently compiled kernel 2.6.9 and am using ReiserFS so I think the all those things about "pages" are related to the Reiser paging system.
My CPU (amd athlon 3000) is really hard to keep cool; I have already three cooler installed in my box and have removed the side of the box, but still, when I rebooted it after the lockdown the CPU temperate was 68.5C / 155F.
I really think this is the reason of the kernel exception, but thought i should post just in case it is not.