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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4ffa926a9d9sm135952921cf.25.2026.01.12.18.31.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jan 2026 18:31:17 -0800 (PST) Date: Mon, 12 Jan 2026 21:30:43 -0500 From: Gregory Price To: dan.j.williams@intel.com Cc: Balbir Singh , Yury Norov , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, kernel-team@meta.com, longman@redhat.com, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, corbet@lwn.net, gregkh@linuxfoundation.org, rafael@kernel.org, dakr@kernel.org, dave@stgolabs.net, jonathan.cameron@huawei.com, dave.jiang@intel.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, akpm@linux-foundation.org, vbabka@suse.cz, surenb@google.com, mhocko@suse.com, jackmanb@google.com, ziy@nvidia.com, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, yury.norov@gmail.com, linux@rasmusvillemoes.dk, rientjes@google.com, shakeel.butt@linux.dev, chrisl@kernel.org, kasong@tencent.com, shikemeng@huaweicloud.com, nphamcs@gmail.com, bhe@redhat.com, baohua@kernel.org, yosry.ahmed@linux.dev, chengming.zhou@linux.dev, roman.gushchin@linux.dev, muchun.song@linux.dev, osalvador@suse.de, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, cl@gentwo.org, harry.yoo@oracle.com, zhengqi.arch@bytedance.com Subject: Re: [RFC PATCH v3 0/8] mm,numa: N_PRIVATE node isolation for device-managed memory Message-ID: References: <20260108203755.1163107-1-gourry@gourry.net> <6604d787-1744-4acf-80c0-e428fee1677e@nvidia.com> <696566a1e228d_2071810076@dwillia2-mobl4.notmuch> <696571507b075_20718100d4@dwillia2-mobl4.notmuch> <966ce77a-c055-4ab8-9c40-d02de7b67895@nvidia.com> <69659d418650a_207181009a@dwillia2-mobl4.notmuch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <69659d418650a_207181009a@dwillia2-mobl4.notmuch> X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 2B55C100002 X-Stat-Signature: azi5n5xtd5b3wozadwmfqc8qxdqrssnt X-Rspam-User: X-HE-Tag: 1768271479-124141 X-HE-Meta: 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 TJ25p0rR GBp24EzfR8onK2KpvDNbks6msAn90YA3/CPEznbADu+drABX9ND28N3darWDMT3tw+9Ot+n+PqS4Rap48TKZW+gaTrikm+g1++gzoXRTtlUA5Mim0RA5GdPWR0JBDzo0kwOHdVbL9Ye0Zkc1yG30cvSh42zdAvftBrKKEfoyrS+pSVS7043lfAM0zbZc+QriLSFAi0YYWhvf/q8UCqsTVN5LrwjXgR4oQ8vUyaDcTrLDGeUEXwtnwvLVaU8jjlTxzFT0eUXoW3l861Vvc2umgnCbJuRpaJ+p0qHuDYdUHLH1/bqJ31XqeMj/EHCQrnA76NYv2MGMZE8DsfqpequzEn8IQyN0aM1azwynBLitCZcOKfguvLGfA+nceCVMEwi2QnY9A/A8OFGCj5JF9nT54O0ERuq2GhPRAfXq/CYB451s/k1GECrorNJy0AuPnvmjUmQ2gX7E7g+6ZKjuPZkt+8+VSmQ== 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 Mon, Jan 12, 2026 at 05:17:53PM -0800, dan.j.williams@intel.com wrote: > > I think what Balbir is saying is that the _PUBLIC is implied and can be > omitted. It is true that N_MEMORY[_PUBLIC] already indicates multi-zone > support. So N_MEMORY_PRIVATE makes sense to me as something that it is > distinct from N_{HIGH,NORMAL}_MEMORY which are subsets of N_MEMORY. > Distinct to prompt "go read the documentation to figure out why this > thing looks not like the others". Ah, ack. Will update for v4 once i give some thought to the compression stuff and the cgroups notes. I would love if the ZONE_DEVICE folks could also chime in on whether the callback structures for pgmap and hmm might be re-usable here, but might take a few more versions to get the attention of everyone. ~Gregory