Re: [PATCH 2/6] change alloc function in pcpu_alloc_pages

[Christoph Lameter]

On Tue, 20 Apr 2010, Mel Gorman wrote:

> alloc_pages_exact_node() avoids a branch in a hot path that is checking for
> something the caller already knows. That's the reason it exists.

We can avoid alloc_pages_exact_node() by making all callers of
alloc_pages_node() never use -1. -1 is ambiguous and only rarely will a
caller pass that to alloc_pages_node().


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