linux-kernel - [PATCH v3 0/4] Refactoring for remove_memory_section/unregister_mem_sect_under

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Message-Id: <20180815144219.6014-1-osalvador@techadventures.net>
Date:   Wed, 15 Aug 2018 16:42:15 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     akpm@...ux-foundation.org
Cc:     mhocko@...e.com, vbabka@...e.cz, dan.j.williams@...el.com,
        yasu.isimatu@...il.com, jonathan.cameron@...wei.com,
        david@...hat.com, Pavel.Tatashin@...rosoft.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v3 0/4] Refactoring for remove_memory_section/unregister_mem_sect_under_nodes

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

v2 -> v3:
        - NODEMASK_FREE can deal with NULL pointers, so do not
          make it conditional (by David).
        - Split up node_online's check patch (David's suggestion)
        - Added Reviewed-by from Andrew and David
        - Fix checkpath.pl warnings

This patchset does some cleanups and refactoring in the memory-hotplug code.

The first and the second patch are pretty straightforward, as they
only remove unused arguments/checks.

The third one refactors unregister_mem_sect_under_nodes.
This is needed to have a proper fallback in case we could not allocate
memory. (details can be seen in patch3).

The fourth patch removes a node_online check.
We are getting the nid from pages that are yet not removed, but a node
can only be offline when its memory/cpu's have been removed.
Therefore, we do not really need to check for the node to be online here.
Since this change has a patch for itself, we could quickly revert it
if we notice that something is wrong with it, or drop it if people
are concerned about it.

Oscar Salvador (4):
  mm/memory-hotplug: Drop unused args from remove_memory_section
  mm/memory_hotplug: Drop mem_blk check from
    unregister_mem_sect_under_nodes
  mm/memory_hotplug: Refactor unregister_mem_sect_under_nodes
  mm/memory_hotplug: Drop node_online check in
    unregister_mem_sect_under_nodes

 drivers/base/memory.c |  5 ++---
 drivers/base/node.c   | 29 +++++++++++++++--------------
 include/linux/node.h  |  5 ++---
 3 files changed, 19 insertions(+), 20 deletions(-)

-- 
2.13.6