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[134.134.136.100]) by mx.google.com with ESMTPS id z9si10303965pgi.341.2019.06.17.01.46.35 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 01:46:35 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of richardw.yang@linux.intel.com designates 134.134.136.100 as permitted sender) client-ip=134.134.136.100; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of richardw.yang@linux.intel.com designates 134.134.136.100 as permitted sender) smtp.mailfrom=richardw.yang@linux.intel.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Jun 2019 01:46:34 -0700 X-ExtLoop1: 1 Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga001.fm.intel.com with ESMTP; 17 Jun 2019 01:46:33 -0700 Date: Mon, 17 Jun 2019 16:46:10 +0800 From: Wei Yang To: Anshuman Khandual Cc: Wei Yang , linux-mm@kvack.org, akpm@linux-foundation.org, pasha.tatashin@oracle.com, osalvador@suse.de Subject: Re: [PATCH] mm/sparse: set section nid for hot-add memory Message-ID: <20190617084610.GA8206@richard> Reply-To: Wei Yang References: <20190616023554.19316-1-richardw.yang@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) 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, Jun 17, 2019 at 09:53:05AM +0530, Anshuman Khandual wrote: >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 Thanks -- Wei Yang Help you, Help me