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SubjectRe: 2.3.27 always keeping 15M free?
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> > You also need to figure very fast when you will need to do this otherwise
> > your performance goes through the floor.
>
> it should be rather fast. But if higher-order zones are completely
> allocated then we are under heavy memory pressure anyway. But it should
> work already.

On a 20Mb machine we were 10% down on performance until the code was tweaked
to find a DMA fallback in the same pass of memory. Obviously thats with the
old allocator so doesnt translate exactly


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