Re: [PATCH 1/2] mm/vmscan: Accumulate nr_demoted for accurate demotion statistics

[Kaiyang Zhao]

> Well... I know what was going on, the second pass will override stat-＞nr_demoted to be *zero* that makes the first try  stat-＞nr_demoted got lost.
 
Ah you are right. This is a bug when demotion partially succeeds in
the first pass. Thanks for catching it.

Acked-by: Kaiyang Zhao <kaiyang2@xxxxxxxxxx>