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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id m207sm8134554oig.2.2018.12.11.18.18.04 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 11 Dec 2018 18:18:04 -0800 (PST) Date: Tue, 11 Dec 2018 20:18:04 -0600 From: Rob Herring To: Atish Patra Cc: linux-kernel@vger.kernel.org, Sudeep Holla , Albert Ou , Anup Patel , Ard Biesheuvel , Atish Patra , Catalin Marinas , devicetree@vger.kernel.org, Dmitriy Cherkasov , Greg Kroah-Hartman , Ingo Molnar , Jeremy Linton , Juri Lelli , "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" , linux-riscv@lists.infradead.org, Mark Rutland , Morten Rasmussen , Palmer Dabbelt , "Peter Zijlstra (Intel)" , "Rafael J. Wysocki" , Thomas Gleixner , Will Deacon Subject: Re: [RFT PATCH v1 1/4] Documentation: DT: arm: add support for sockets defining package boundaries Message-ID: <20181212021804.GA13998@bogus> References: <1543534100-3654-1-git-send-email-atish.patra@wdc.com> <1543534100-3654-2-git-send-email-atish.patra@wdc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1543534100-3654-2-git-send-email-atish.patra@wdc.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 29 Nov 2018 15:28:17 -0800, Atish Patra wrote: > From: Sudeep Holla > > The current ARM DT topology description provides the operating system > with a topological view of the system that is based on leaf nodes > representing either cores or threads (in an SMT system) and a > hierarchical set of cluster nodes that creates a hierarchical topology > view of how those cores and threads are grouped. > > However this hierarchical representation of clusters does not allow to > describe what topology level actually represents the physical package or > the socket boundary, which is a key piece of information to be used by > an operating system to optimize resource allocation and scheduling. > > Lets add a new "socket" node type in the cpu-map node to describe the > same. > > Signed-off-by: Sudeep Holla > --- > Documentation/devicetree/bindings/arm/topology.txt | 52 ++++++++++++++++------ > 1 file changed, 39 insertions(+), 13 deletions(-) > Reviewed-by: Rob Herring