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[217.140.110.172]) by mx.google.com with ESMTP id l5si7493318edd.7.2019.06.16.21.22.46 for ; Sun, 16 Jun 2019 21:22:46 -0700 (PDT) Received-SPF: pass (google.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) client-ip=217.140.110.172; Authentication-Results: mx.google.com; spf=pass (google.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C5201344; Sun, 16 Jun 2019 21:22:45 -0700 (PDT) Received: from [10.162.42.123] (p8cg001049571a15.blr.arm.com [10.162.42.123]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4AEC63F738; Sun, 16 Jun 2019 21:22:44 -0700 (PDT) Subject: Re: [PATCH] mm/sparse: set section nid for hot-add memory To: Wei Yang , linux-mm@kvack.org Cc: akpm@linux-foundation.org, pasha.tatashin@oracle.com, osalvador@suse.de References: <20190616023554.19316-1-richardw.yang@linux.intel.com> From: Anshuman Khandual Message-ID: Date: Mon, 17 Jun 2019 09:53:05 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190616023554.19316-1-richardw.yang@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit 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 06/16/2019 08:05 AM, Wei Yang wrote: > section_to_node_table[] is used to record section's node id, which is > used in page_to_nid(). While for hot-add memory, this is missed. Used for NODE_NOT_IN_PAGE_FLAGS case and it is missed for hot-added memory. > > BTW, current online_pages works because it leverages nid in memory_block. It does. > But the granularity of node id should be mem_section wide. Right. > > Signed-off-by: Wei Yang Reviewed-by: Anshuman Khandual