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c=relaxed/simple; d=linux-foundation.org; s=korg; t=1690313400; bh=OoSjqjANODd3KfCGOV5QoBOToju0dohDhyNGk30onVI=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=c7KZ8NqR9D1lUt5VVPt4OEtIejA2HJp/Z5r1YCj9WDgNDXATlwmQ9uFGel4lE9Sb3 uF8SXTGuepx56KwB5CTOFOC+tvVzR3Nzvth7GsqRYTxXNTqcd7thesPmqlExKgbiv3 wM5l31aYjOPZI0bUoN0VNAXehAn3h+jrmwmAicBM= Date: Tue, 25 Jul 2023 12:29:59 -0700 From: Andrew Morton To: "Aneesh Kumar K.V" Cc: linux-mm@kvack.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com, christophe.leroy@csgroup.eu, Oscar Salvador , Mike Kravetz , Dan Williams , Joao Martins , Catalin Marinas , Muchun Song , Will Deacon Subject: Re: [PATCH v6 00/13] Add support for DAX vmemmap optimization for ppc64 Message-Id: <20230725122959.e9b79e7528cd3084802fa6d0@linux-foundation.org> In-Reply-To: <20230724190759.483013-1-aneesh.kumar@linux.ibm.com> References: <20230724190759.483013-1-aneesh.kumar@linux.ibm.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 41D8B80018 X-Rspam-User: X-Stat-Signature: uaztu3zj7iww4meh8mefaspjxj6re5wu X-Rspamd-Server: rspam03 X-HE-Tag: 1690313401-889058 X-HE-Meta: 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 E2kQyDYb keS1ufTd4Gw6NGJdtfvYGjICh3bBhYm2sBMci/lwHHu5Aw4NHxawTcuQPXBFcQzQi9phyP4m89pB5iXKnR+FISUetppMaMNAhJUw9vUYBAeN5zIGx3PJHDmDP/6sn58oZ1vdaT1SNyHcDMCuHy16J0ICs2ev+f0QNt6FQ/dnbtTCt5ZTCD12zYsI7ITZgTLONXzHRMj9+BQwaqkXsIGfSIaQ9lX9Xq9j0nd/djfyvYz3ZHuXQrl49U/CfFzqD5MxC40dzz/mYmHLdyWosUgiIMIKvvN2O1iB+HuqPgJQuTBzFjBCDoGSm+o6Y40TUv/TB+8D1YMSJp+GBs5gWYPjXcDerZDNfOuqi3LWK 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 Tue, 25 Jul 2023 00:37:46 +0530 "Aneesh Kumar K.V" wrote: > This patch series implements changes required to support DAX vmemmap > optimization for ppc64. Do we have any measurements to help us understand the magnitude of this optimization? And any documentation which helps users understand whether and why they should enable this feature?