zeroing pages in the idle task?

[Benjamin Herrenschmidt]

>> It would be cleaner to have the page mapped with a non-cacheable
>> mapping while the idle task is clearing it but you still have to be
>> careful about cache inconsistencies, particularly if the page is
>> mapped twice and one mapping is cacheable and the other isn't.
>
>It might be interesting to try using a DMA engine on MPC 106/107 systems
>to clear pages in the background. I've seen some simulations which
>suggest that this could be a big win, but I'd have to spend a while
>digging through the IEEE archives to find them again.

I didn't find any mention of a DMA engine in the MPC106... Or did I miss
something ?

Ben.


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