context overflow

[Cort Dougan]

} that the port is not using the PowerPC architecture as intended.  By not
} utilizing the hardware assists, the port is not performing at its optimal
} level.

I have data, and have written a paper with Victor and Paul, showing that we
get performance _increases_ by not using the PowerPC MMU architecture as
intended.  I think the PPC architecture intentions for the hash table and
TLB and very very poor and restrictive.  The 603 was a good step forward
but the 750, 7400 and follow-ons have been steps backwards from this good
start.

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