On Thu, 13 Jan 2000, Alan Cox wrote:

quoted

I think that busier machines probably have a larger need
for DMA memory than this code fragment will give us. I
have the gut feeling that we'll want to keep about 512kB
or more free in the lower 16MB of busy machines...

2.2.x uses a simple algorithm. Normally allocations come from the
main pool if it fails we use the DMA pool. That seems to work just
fine.

Of course, I should have thought of that.

Our `high-to-low' allocation strategy should make
sure that the free pages `propagate down'...

Now we'll only want to build something into kswapd
so that rebalancing the high memory zones is done in
the background.

regards,

Rik
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