Re: [PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone)

[Johannes Weiner]

On Tue, Feb 23, 2016 at 03:04:24PM +0000, Mel Gorman wrote:
> ac->classzone_idx is determined by the index of the preferred zone and cached
> to avoid repeated calculations. wake_all_kswapds() should use it instead of
> using zone_idx() within a loop.
> 
> Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>