Re: [PATCH 3/5] mm, pagevec: Release/reacquire lru_lock on pgdat change

[Minchan Kim]

On Fri, Jul 15, 2016 at 02:09:23PM +0100, Mel Gorman wrote:
> With node-lru, the locking is based on the pgdat. Previously it was
> required that a pagevec drain released one zone lru_lock and acquired
> another zone lru_lock on every zone change. Now, it's only necessary if
> the node changes. The end-result is fewer lock release/acquires if the
> pages are all on the same node but in different zones.
> 
> Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>

check_move_unevictable_pages could be a candidate, too.