> 
> 			fffffc00004e2700 T pciide_dma_start
> pc: fffffc00004e27a0
> 			fffffc00004e2700 T pciide_dma_start
> ra: fffffc00004e2798
> 
> 			fffffc000030061c T idle
> pc: fffffc0000300640
> 			fffffc0000365e20 T mi_switch
> ra: fffffc000036600c
> 
> How/why would the pc and the ra be in the same function in the first
> case?!?!?

branches

> 
> The second one is a bit of a worry too (panic while idle), especially in
> light of Andrei's message saying that 660 is a double bit ECC error...

Maybe. 660 can also be triggered by certain I/O accesses that cause the memory
system to have a double bit error too....

Try turning off DMA for your IDE drive and see if that helps. Just a guess.

-matt