linux-kernel - [PATCH v2 0/5] Add zone overlapping check

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Message-Id: <1459476406-28418-1-git-send-email-iamjoonsoo.kim@lge.com>
Date:	Fri,  1 Apr 2016 11:06:41 +0900
From:	js1304@...il.com
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Mel Gorman <mgorman@...e.de>,
	Laura Abbott <lauraa@...eaurora.org>,
	Minchan Kim <minchan@...nel.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 0/5] Add zone overlapping check

From: Joonsoo Kim <iamjoonsoo.kim@....com>

Change from v1
o drop patch 1 ("mm/page_alloc: fix same zone check in
__pageblock_pfn_to_page()") per Mel's comment

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.

-----pfn-------->
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-20160330.

Thanks.

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

Joonsoo Kim (5):
  mm/hugetlb: add same zone check in pfn_range_valid_gigantic()
  mm/memory_hotplug: add comment to some functions related to memory
    hotplug
  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     | 7 ++++++-
 mm/page_isolation.c | 1 +
 mm/page_owner.c     | 3 +++
 mm/vmstat.c         | 7 +++++++
 5 files changed, 23 insertions(+), 4 deletions(-)

-- 
1.9.1