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SubjectRe: [PATCH 1/6] mm/page_alloc: fix same zone check in __pageblock_pfn_to_page()
On Mon, Mar 14, 2016 at 04:31:32PM +0900, js1304@gmail.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
>
> There is a system that node's pfn are overlapped like as following.
>
> -----pfn-------->
> N0 N1 N2 N0 N1 N2
>
> Therefore, we need to care this overlapping when iterating pfn range.
>
> In __pageblock_pfn_to_page(), there is a check for this but it's
> not sufficient. This check cannot distinguish the case that zone id
> is the same but node id is different. This patch fixes it.
>

I think you may be mixing up page_zone_id with page_zonenum.

--
Mel Gorman
SUSE Labs

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