On Thu, Jul 11, 2019 at 10:25:27AM +0900, Minchan Kim wrote:

The isolate counting is pecpu counter so it would be not huge gain
to work them by batch. Rather than complicating to make them batch,
let's make it more stright-foward via adding the counting logic
into [isolate|putback]_lru_page API.

* v1
 * fix accounting bug - Hillf

Link: http://lkml.kernel.org/r/20190531165927.GA20067@cmpxchg.org
Acked-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Minchan Kim <minchan@kernel.org>

This is tricky to review, but fwiw it looks correct to me.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>