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[2003:cb:c726:4100:c308:78e3:8f80:52ac]) by smtp.gmail.com with ESMTPSA id y17-20020adfee11000000b003330a1d35b6sm3708872wrn.115.2023.12.01.01.29.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Dec 2023 01:29:36 -0800 (PST) Message-ID: <135306b4-2f94-4266-8f72-90315bb846b4@redhat.com> Date: Fri, 1 Dec 2023 10:29:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/6] Supporting GMEM (generalized memory management) for external memory devices To: zhuweixi , Dave Airlie , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "weixi.zhu@openeuler.sh" , "mgorman@suse.de" , "jglisse@redhat.com" , "rcampbell@nvidia.com" , "jhubbard@nvidia.com" , "apopple@nvidia.com" , "mhairgrove@nvidia.com" , "ziy@nvidia.com" , "alexander.deucher@amd.com" , "Xinhui.Pan@amd.com" , "amd-gfx@lists.freedesktop.org" , "Felix.Kuehling@amd.com" , "ogabbay@kernel.org" , "dri-devel@lists.freedesktop.org" , "jgg@nvidia.com" , "leonro@nvidia.com" , "zhenyuw@linux.intel.com" , "zhi.a.wang@intel.com" , "intel-gvt-dev@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" , "jani.nikula@linux.intel.com" , "joonas.lahtinen@linux.intel.com" , "rodrigo.vivi@intel.com" , "tvrtko.ursulin@linux.intel.com" , "Zeng, Oak" References: <20231128125025.4449-1-weixi.zhu@huawei.com> <9308a79d-e312-4e6d-98fe-75dc6d0fbeda@amd.com> <188814aa-4f55-40c6-961c-6105c89d76f3@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 57FFB140004 X-Stat-Signature: h8bcsc61fp19u9j45bi9n7k1pcw8ee58 X-Rspam-User: X-HE-Tag: 1701422980-416935 X-HE-Meta: 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 37lL+4KP GlJQup+Bhfbm/tvZkZVXcuI6PTjdAigI3PCCJL4Okh1S02YKiJtoqX3hC/qgV6Zd/kPpOhYo0gPrfoOUGDuw6RAGsHNFcKXQkp5JFcGrDUWBzdXQ3RmnmRN8sxQtgtFiJGeGpgflZBANKj/AWzuoNWYoD3kySxc2Q8Adk7F+0D8VvNIyDqK5HeJR7l3cshEW3BaYnXuy3YxNvYsnEBSypTL7DNtHItYLrjaK9oUs4BA5tA301o8e0Xs+nIgpWP0qLAMe+/cQQxvJSphwhJ5uIgbc5GrZpdzTKw8mnYWW8g6XnOq1+xnBAzyz67bsuBnSHJ8Xdu3kCpoQbaLWT10zfqEHm98h9iYq+hYewCddpevzIxUNstVjLuMzGHhaH82x0Qx/aJVdynV1Z0iwRk4qXHZrzNCbgefSl/s5GtqzUhxnk3tBVVSEVaID3bJAEEemihUTFegsVZF4cIWdXfefa3d7mpw== 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: List-Subscribe: List-Unsubscribe: On 01.12.23 03:44, zhuweixi wrote: > Thanks! I hope you understood that that was a joke :) > I am planning to present GMEM in Linux MM Alignment Sessions so I can collect more input from the mm developers. Sounds good. But please try inviting key HMM/driver developer as well. Most of the core-mm folks attending that meeting are not that familiar with these concepts and they are usually not happy about: (1) More core-MM complexity for things that can be neatly handled in separate subsystems with the existing infrastructure already. (2) One new way of doing things why the other things remain in place. (3) New MMAP flags. Usually you have a hard time getting this in. Sometimes, there are other ways (e.g., special-purpose file- systems). (4) Changing controversial core-mm design decisions to handle corner cases. -- Cheers, David / dhildenb