linux-kernel - [PATCH 0/3] make pfn walker support ZONE

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Message-ID: <20191108000855.25209-1-t-fukasawa@vx.jp.nec.com>
Date:   Fri, 8 Nov 2019 00:08:03 +0000
From:   Toshiki Fukasawa <t-fukasawa@...jp.nec.com>
To:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "mhocko@...nel.org" <mhocko@...nel.org>,
        "adobriyan@...il.com" <adobriyan@...il.com>,
        "hch@....de" <hch@....de>,
        "longman@...hat.com" <longman@...hat.com>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "mst@...hat.com" <mst@...hat.com>, "cai@....pw" <cai@....pw>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Junichi Nomura <j-nomura@...jp.nec.com>
Subject: [PATCH 0/3] make pfn walker support ZONE_DEVICE

This patch set tries to make pfn walker support ZONE_DEVICE.
This idea is from the TODO in below patch:

  commit aad5f69bc161af489dbb5934868bd347282f0764
  Author: David Hildenbrand <david@...hat.com>
  Date:   Fri Oct 18 20:19:20 2019 -0700

	fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c

pfn walker's ZONE_DEVICE support requires capability to identify
that a memmap has been initialized. The uninitialized cases are 
as follows:

	a) pages reserved for ZONE_DEVICE driver
	b) pages currently initializing

This patch set solves both of them.

Toshiki Fukasawa (3):
  procfs: refactor kpage_*_read() in fs/proc/page.c
  mm: Introduce subsection_dev_map
  mm: make pfn walker support ZONE_DEVICE

 fs/proc/page.c           | 155 ++++++++++++++++++++---------------------------
 include/linux/memremap.h |   6 ++
 include/linux/mmzone.h   |  19 ++++++
 mm/memremap.c            |  31 ++++++++++
 mm/sparse.c              |  32 ++++++++++
 5 files changed, 154 insertions(+), 89 deletions(-)

-- 
1.8.3.1