linux-kernel - [PATCH v2 0/3] powerpc/mm: movable hotplug memory nodes

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Date:   Wed, 14 Sep 2016 15:06:55 -0500
From:   Reza Arbab <arbab@...ux.vnet.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Bharata B Rao <bharata@...ux.vnet.ibm.com>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Stewart Smith <stewart@...ux.vnet.ibm.com>,
        Alistair Popple <apopple@....ibm.com>,
        Balbir Singh <bsingharora@...il.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH v2 0/3] powerpc/mm: movable hotplug memory nodes

These changes enable onlining memory into ZONE_MOVABLE on power, and the 
creation of discrete nodes of movable memory.

We provide a way to describe the extents and numa associativity of such 
a node in the device tree, yet still defer the memory addition to take 
place post-boot through hotplug.

In v1, this patchset introduced a new dt compatible id to explicitly 
create a memoryless node at boot. Here, things have been simplified to 
be applicable regardless of the status of node hotplug on power. We 
still intend to enable hotadding a pgdat, but that's now untangled as a 
separate topic.

v2:
* Use the "status" property of standard dt memory nodes instead of 
  introducing a new "ibm,hotplug-aperture" compatible id.

* Remove the patch which explicitly creates a memoryless node. This set 
  no longer has any bearing on whether the pgdat is created at boot or 
  at the time of memory addition.

v1:
* http://lkml.kernel.org/r/1470680843-28702-1-git-send-email-arbab@linux.vnet.ibm.com

Reza Arbab (3):
  drivers/of: recognize status property of dt memory nodes
  powerpc/mm: allow memory hotplug into a memoryless node
  mm: enable CONFIG_MOVABLE_NODE on powerpc

 Documentation/kernel-parameters.txt |  2 +-
 arch/powerpc/mm/numa.c              | 13 +------------
 drivers/of/fdt.c                    |  8 ++++++++
 mm/Kconfig                          |  2 +-
 4 files changed, 11 insertions(+), 14 deletions(-)

-- 
1.8.3.1