linux-kernel - [PATCH v1 0/5] mm/memory_hotplug: online/offline

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Date:   Thu, 16 Aug 2018 12:06:23 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Kemi Wang <kemi.wang@...el.com>,
        David Rientjes <rientjes@...gle.com>,
        Jia He <jia.he@...-semitech.com>,
        Oscar Salvador <osalvador@...e.de>,
        Petr Tesarik <ptesarik@...e.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dan Williams <dan.j.williams@...el.com>,
        David Hildenbrand <david@...hat.com>,
        Mathieu Malaterre <malat@...ian.org>,
        Baoquan He <bhe@...hat.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Ross Zwisler <zwisler@...nel.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH v1 0/5] mm/memory_hotplug: online/offline_pages refactorings

While looking into onlining/offlining of subsections, I noticed that
online/offlining code can in its current form only deal with whole sections
and that onlining/offlining of sections that are already online/offline is
problematic. So let's add some additional checks (that also serve as
implicit documentation) and do some cleanups.

David Hildenbrand (5):
  mm/memory_hotplug: drop intermediate __offline_pages
  mm/memory_hotplug: enforce section alignment when onlining/offlining
  mm/memory_hotplug: check if sections are already online/offline
  mm/memory_hotplug: onlining pages can only fail due to notifiers
  mm/memory_hotplug: print only with DEBUG_VM in online/offline_pages()

 include/linux/mmzone.h |  2 ++
 mm/memory_hotplug.c    | 43 ++++++++++++++++++++++--------------------
 mm/sparse.c            | 28 +++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 20 deletions(-)

-- 
2.17.1