Re: OOM fixes 2/5

[Andrew Morton]

Andrea Arcangeli <andrea@xxxxxxx> wrote:
>
>  This is the forward port to 2.6 of the lowmem_reserved algorithm I
>  invented in 2.4.1*, merged in 2.4.2x already and needed to fix workloads
>  like google (especially without swap) on x86 with >1G of ram, but it's
>  needed in all sort of workloads with lots of ram on x86, it's also
>  needed on x86-64 for dma allocations. This brings 2.6 in sync with
>  latest 2.4.2x.

But this patch doesn't change anything at all in the page allocation path
apart from renaming lots of things, does it?

AFAICT all it does is to change the default values in the protection map. 
It does it via a simplification, which is nice, but I can't see how it
fixes anything.

Confused.
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