Re: [PATCH 29/34] mm, page_alloc: remove fair zone allocation policy

[Johannes Weiner]

On Fri, Jul 08, 2016 at 10:35:05AM +0100, Mel Gorman wrote:
> The fair zone allocation policy interleaves allocation requests between
> zones to avoid an age inversion problem whereby new pages are reclaimed to
> balance a zone.  Reclaim is now node-based so this should no longer be an
> issue and the fair zone allocation policy is not free.  This patch removes
> it.
> 
> Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>

It's indeed no longer needed with a single set of LRUs on each NUMA
node. I'm glad this wart is finally going. Thanks Mel.

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>