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[54.240.9.99]) by mx.google.com with ESMTPS id a24si1236089qth.308.2018.12.27.12.07.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 27 Dec 2018 12:07:27 -0800 (PST) Received-SPF: pass (google.com: domain of 01000167f14761d6-b1564081-0d5f-4752-86be-2e99c8375866-000000@amazonses.com designates 54.240.9.99 as permitted sender) client-ip=54.240.9.99; Authentication-Results: mx.google.com; dkim=pass header.i=@amazonses.com header.s=ug7nbtf4gccmlpwj322ax3p6ow6yfsug header.b=TOF2ro9U; spf=pass (google.com: domain of 01000167f14761d6-b1564081-0d5f-4752-86be-2e99c8375866-000000@amazonses.com designates 54.240.9.99 as permitted sender) smtp.mailfrom=01000167f14761d6-b1564081-0d5f-4752-86be-2e99c8375866-000000@amazonses.com DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=ug7nbtf4gccmlpwj322ax3p6ow6yfsug; d=amazonses.com; t=1545941246; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:MIME-Version:Content-Type:Feedback-ID; bh=QTawriguloQdF7CFQCrxqBobe3Vbqu3Bc8KBa60ZtJY=; b=TOF2ro9UED8NSFyGorBRsg+X2DDadwH1nM2B9UdS6Bhj2/qGg+zM4pDa67jHnv16 sqcbXF8yAOKi4/erGhfr/4AEEK/+b+zmwBDhpxj2i0ndnFLIfX/72SM2mYZ+rKoV21n MOE+VlpbpmatqS5fDdmrTqc2jcBtjLUH3HMFK8Rk= Date: Thu, 27 Dec 2018 20:07:26 +0000 From: Christopher Lameter X-X-Sender: cl@nuc-kabylake To: Fengguang Wu cc: Andrew Morton , Linux Memory Management List , Fan Du , kvm@vger.kernel.org, LKML , Yao Yuan , Peng Dong , Huang Ying , Liu Jingqi , Dong Eddie , Dave Hansen , Zhang Yi , Dan Williams Subject: Re: [RFC][PATCH v2 08/21] mm: introduce and export pgdat peer_node In-Reply-To: <20181226133351.521151384@intel.com> Message-ID: <01000167f14761d6-b1564081-0d5f-4752-86be-2e99c8375866-000000@email.amazonses.com> References: <20181226131446.330864849@intel.com> <20181226133351.521151384@intel.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-SES-Outgoing: 2018.12.27-54.240.9.99 Feedback-ID: 1.us-east-1.fQZZZ0Xtj2+TD7V5apTT/NrT6QKuPgzCT/IC7XYgDKI=:AmazonSES 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: Message-ID: <20181227200726.7UkGDY1McWKeSEXrxrNP6JoNxSSnz7Uny21TPUH2DFU@z> On Wed, 26 Dec 2018, Fengguang Wu wrote: > Each CPU socket can have 1 DRAM and 1 PMEM node, we call them "peer nodes". > Migration between DRAM and PMEM will by default happen between peer nodes. Which one does numa_node_id() point to? I guess that is the DRAM node and then we fall back to the PMEM node?