Re: [patch 1/5] mm: page_alloc: increase __GFP_BITS_SHIFT to include__GFP_OTHER_NODE

[Andi Kleen]

On Mon, Jul 25, 2011 at 10:19:15PM +0200, Johannes Weiner wrote:
> From: Johannes Weiner <hannes@xxxxxxxxxxx>
> 
> __GFP_OTHER_NODE is used for NUMA allocations on behalf of other
> nodes.  It's supposed to be passed through from the page allocator to
> zone_statistics(), but it never gets there as gfp_allowed_mask is not
> wide enough and masks out the flag early in the allocation path.
> 
> The result is an accounting glitch where successful NUMA allocations
> by-agent are not properly attributed as local.
> 
> Increase __GFP_BITS_SHIFT so that it includes __GFP_OTHER_NODE.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

-Andi
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