linux-kernel - [PATCH 0/4] Small cleanup for memoryhotplug

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Message-Id: <20180601125321.30652-1-osalvador@techadventures.net>
Date:   Fri,  1 Jun 2018 14:53:17 +0200
From:   osalvador@...hadventures.net
To:     akpm@...ux-foundation.org
Cc:     mhocko@...e.com, vbabka@...e.cz, pasha.tatashin@...cle.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 0/4] Small cleanup for memoryhotplug

From: Oscar Salvador <osalvador@...e.de>

Hi,

I wanted to give it a try and do a small cleanup in the memhotplug's code.
A lot more could be done, but I wanted to start somewhere.
I tried to unify/remove duplicated code.

The following is what this patchset does:

1) add_memory_resource() has code to allocate a node in case it was offline.
   Since try_online_node has some code for that as well, I just made add_memory_resource() to
   use that so we can remove duplicated code..
   This is better explained in patch 1/4.

2) register_mem_sect_under_node() will be called only from link_mem_sections()

3) Get rid of link_mem_sections() in favour of walk_memory_range() with a callback to
   register_mem_sect_under_node()

4) Drop unnecessary checks from register_mem_sect_under_node()

I have done some tests and I could not see anything broken because of 
this patchset.

Oscar Salvador (4):
  mm/memory_hotplug: Make add_memory_resource use __try_online_node
  mm/memory_hotplug: Call register_mem_sect_under_node
  mm/memory_hotplug: Get rid of link_mem_sections
  mm/memory_hotplug: Drop unnecessary checks from
    register_mem_sect_under_node

 drivers/base/memory.c |   2 -
 drivers/base/node.c   |  52 +++++---------------------
 include/linux/node.h  |  21 +++++------
 mm/memory_hotplug.c   | 101 ++++++++++++++++++++++++++------------------------
 4 files changed, 71 insertions(+), 105 deletions(-)

-- 
2.13.6