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b=ZalrBIh+6TpqN7ymyXJCpyYRdW7dF3W8SHHJm8rtm4xILFsYOGZ1dYTT0+5OJuITx FAF+b88uA8O4ghuRa0FYLpUH2HMkIDWp1zQ/wH4dWLTzXl/f52M53Weh7lUAJIUtYd QIMO8H4LcGaYyDDipdBsn+13+EA9Yo594MvVJ4PkMk9/i8hwn1re6TZKqRuFLDLieF b5CbUtqCpzlGAVDLThfdkLSY9Q0nU18U6jHNb6C2aeg2fMgX5W6xEy+xTduL1NPwVv /xYDwlwS6XmoV8fvratJYauAscLKY/ixlIzEJjty50BxwlgRFyRxAkk0hmF4Hk/F5m n36k2s8+S77vw== Message-ID: <6a9db6ff-2fe8-4be6-baba-7db7913898f2@kernel.org> Date: Wed, 14 Jan 2026 11:49:19 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/8] mm/memory_hotplug: return online type from add_memory_driver_managed() To: Gregory Price , linux-mm@kvack.org Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, kernel-team@meta.com, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, osalvador@suse.de, akpm@linux-foundation.org References: <20260114085201.3222597-1-gourry@gourry.net> <20260114085201.3222597-5-gourry@gourry.net> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: 5txr1jkemgsxqw9re17rupic1376acbd X-Rspam-User: X-Rspamd-Queue-Id: 05BD41C000D X-Rspamd-Server: rspam08 X-HE-Tag: 1768387765-278231 X-HE-Meta: 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 9kwMEflY iJbKYZiwmbhIQEm6EY0W5wl0OA2Ur73Y5JiCfA2xc0BzSVnJx1AmIly0SVlKWfjblwk/Ed2IC/ChEkgqQMdOC8/AducR8q1WITXciBJQ7fM+PuczSLVSSyaQyaS4P3Qi9De8wW0VlKIPkIN0g8DGSqw9Y6ZlQL+0XwQEfmnOkkd3j7eOE21YSKrHaI8GxGYFUJ59YnR/N8/rnHhtHJjL+IbYKJ8qhNK66G9DUtNRCofFyC5xL7rOIHGcbQ2uj+CSHXDZrxMY+JSz7DhAd7iHyZWkvQx/RZl3FJxajY6Mu6x4jjUmgiOZ3AKfnWQ== 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 1/14/26 09:51, Gregory Price wrote: > Change add_memory_driver_managed() to return the online type (MMOP_*) > on success instead of 0. This allows callers to determine the actual > online state of the memory after addition, which is important when > MMOP_SYSTEM_DEFAULT is used and the actual online type depends on the > system default policy. Another reason to just let the caller handle MMOP_SYSTEM_DEFAULT itself by calling mhp_get_default_online_type() :) -- Cheers David