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[209.85.220.65]) by mx.google.com with SMTPS id v22sor6518717otq.137.2019.05.13.14.12.06 for (Google Transport Security); Mon, 13 May 2019 14:12:06 -0700 (PDT) Received-SPF: pass (google.com: domain of dan.j.williams@intel.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@intel-com.20150623.gappssmtp.com header.s=20150623 header.b=DDH2tF8r; spf=pass (google.com: domain of dan.j.williams@intel.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ehW85Lrv2Q48sCjGFVYU8EiJvcqJ/cEoN0rsLhKwFn4=; b=DDH2tF8rRfIjsd+6p3tNZ6N0FrylBCHLkuudu7uIV1T1yuGKEfmS5nhaufD2LxCH0n G845ptMmk8uLtcFNrOm9RJ/y5yUNcE06KAhjuzSEvjcwqluLZzThkkFoVLMzDS/GRFiQ E3YJqmPgTJDanm2yChPEe9Htk6yEnKKy74gZ1xdIUD/wHzbHnBDGzYiaAisiKcyMiL43 a7ia7WeecOqq9//fSUFEgti9KcdEQBl+Yf08zwAb8MthphEbW8tsStK9BfeWjBslJy9P /aU3hHSwS4cAoxn925mw+G8S7Zm+GNjhEPotnhkBeJGxfQcKkGFVGwhIkvS82qmcTcOv 6R5Q== X-Google-Smtp-Source: APXvYqwIGJ0PBLErnWxuRYnfK8Gzj1P5cw9UmR9BtnvGHQjAVMKGB06nxi/SpfU6EmNEkLZmuWLghYQYRcySk2jRhMk= X-Received: by 2002:a9d:6f19:: with SMTP id n25mr12997789otq.367.1557781926319; Mon, 13 May 2019 14:12:06 -0700 (PDT) MIME-Version: 1.0 References: <155718596657.130019.17139634728875079809.stgit@dwillia2-desk3.amr.corp.intel.com> <20190513210148.GA21574@rapoport-lnx> In-Reply-To: <20190513210148.GA21574@rapoport-lnx> From: Dan Williams Date: Mon, 13 May 2019 14:11:54 -0700 Message-ID: Subject: Re: [PATCH v8 00/12] mm: Sub-section memory hotplug support To: Mike Rapoport Cc: Andrew Morton , David Hildenbrand , Jane Chu , Michael Ellerman , Pavel Tatashin , Benjamin Herrenschmidt , Robin Murphy , Anshuman Khandual , Logan Gunthorpe , Paul Mackerras , Toshi Kani , Oscar Salvador , Jeff Moyer , Michal Hocko , Vlastimil Babka , stable , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , linux-nvdimm , Linux MM , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, May 13, 2019 at 2:02 PM Mike Rapoport wrote: > > Hi Dan, > > On Mon, May 06, 2019 at 04:39:26PM -0700, Dan Williams wrote: > > Changes since v7 [1]: > > Sorry for jumping late No worries, it needs to be rebased on David's "mm/memory_hotplug: Factor out memory block device handling" series which puts it firmly in v5.3 territory. > but presuming there will be v9, it'd be great if it > would also include include updates to > Documentation/admin-guide/mm/memory-hotplug.rst and If I've done my job right this series should be irrelevant to Documentation/admin-guide/mm/memory-hotplug.rst. The subsection capability is strictly limited to arch_add_memory() users that never online the memory, i.e. only ZONE_DEVICE / devm_memremap_pages() users. So this isn't "memory-hotplug" as much as it is "support for subsection vmemmap management". > Documentation/vm/memory-model.rst This looks more fitting and should probably include a paragraph on the general ZONE_DEVICE / devm_memremap_pages() use case.