[PATCH 0/6] Add zone overlapping check

From: js1304
Date: Mon Mar 14 2016 - 03:31:54 EST

From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

Hello, all.

This patchset deals with some problematic sites that iterate pfn range.

There is a system that node's pfn are overlapped like as following.

N0 N1 N2 N0 N1 N2

Therefore, we need to care this overlapping when iterating pfn range.

I audit many iterating sites that uses pfn_valid(), pfn_valid_within(),
zone_start_pfn and etc. and others looks safe for me. This is
a preparation step for new CMA implementation, ZONE_CMA [1], because
it would be easily overlapped with other zones. But, zone overlap
check is also needed for general case so I send it separately.

This is based on next-20160311.


[1]: https://lkml.org/lkml/2015/2/12/95

Joonsoo Kim (6):
mm/page_alloc: fix same zone check in __pageblock_pfn_to_page()
mm/hugetlb: add same zone check in pfn_range_valid_gigantic()
mm/memory_hotplug: add comment to some functions related to memory
mm/vmstat: add zone range overlapping check
mm/page_owner: add zone range overlapping check
power: add zone range overlapping check

mm/hugetlb.c | 9 ++++++---
mm/page_alloc.c | 10 +++++++---
mm/page_isolation.c | 1 +
mm/page_owner.c | 3 +++
mm/vmstat.c | 7 +++++++
5 files changed, 24 insertions(+), 6 deletions(-)