On Mon, 6 Feb 2017 23:43:14 +0800 Wei Yang <richard.weiy...@gmail.com> wrote:
> The whole memory space is divided into several zones and nodes may have no > page in some zones. In this case, the __absent_pages_in_range() would > return 0, since the range it is searching for is an empty range. > > Also this happens more often to those nodes with higher memory range when > there are more nodes, which is a trend for future architectures. > > This patch checks the zone range after clamp and adjustment, return 0 if > the range is an empty range. What are the user-visible runtime effects of this change?
