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([2804:431:c7c6:4d9a:784f:a7de:c020:5f1e]) by smtp.gmail.com with ESMTPSA id f193sm80590qke.43.2021.06.15.13.13.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Jun 2021 13:13:37 -0700 (PDT) Subject: Re: [RFC PATCH 6/8] nvdimm: add PPC64 'device-node' property To: "Aneesh Kumar K.V" , qemu-devel@nongnu.org References: <20210615013309.2833323-1-danielhb413@gmail.com> <20210615013309.2833323-7-danielhb413@gmail.com> <874kdzo4kh.fsf@linux.ibm.com> From: Daniel Henrique Barboza Message-ID: Date: Tue, 15 Jun 2021 17:13:31 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <874kdzo4kh.fsf@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::830; envelope-from=danielhb413@gmail.com; helo=mail-qt1-x830.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.095, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Igor Mammedov , qemu-ppc@nongnu.org, groug@kaod.org, Shivaprasad G Bhat , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 6/15/21 6:33 AM, Aneesh Kumar K.V wrote: > Daniel Henrique Barboza writes: > >> The spapr-nvdimm driver is able to operate in two ways. The first >> one is as a regular memory in which the NUMA node of the parent >> pc-dimm class is used. The second mode, as persistent memory, allows for >> a different NUMA node to be used based on the locality of the device. >> >> At this moment we don't have a way to express this second NUMA node for >> the persistent memory mode. This patch introduces a new 'device-node' >> property that will be used by the PPC64 spapr-nvdimm driver to set a >> second NUMA node for the nvdimm. > > if device-node is not specified on the commandline, we should default to > the same value of node= attribute? Right now I am finding this default > to 0. I agree. I fixed it in the next version to default to the 'node' value when 'device-node' is omitted. Daniel > > -aneesh >