Re: [PATCH 04/20] Convert gfp_zone() to use a table of precalculatedvalue

[Christoph Lameter]

On Mon, 23 Feb 2009, Mel Gorman wrote:

> > Maybe we can come up with a version of gfp_zone that has no branches and
> > no lookup?
> >
>
> Ideally, yes, but I didn't spot any obvious way of figuring it out at
> compile time then or now. Suggestions?

Can we just mask the relevant bits and then find the highest set bit? With
some rearrangement of gfp flags this may work.

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