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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8927a07c731sm10671566d6.34.2026.01.14.09.28.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jan 2026 09:28:34 -0800 (PST) Date: Wed, 14 Jan 2026 12:28:01 -0500 From: Gregory Price To: "David Hildenbrand (Red Hat)" Cc: linux-mm@kvack.org, 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 Subject: Re: [PATCH 4/8] mm/memory_hotplug: return online type from add_memory_driver_managed() Message-ID: References: <20260114085201.3222597-1-gourry@gourry.net> <20260114085201.3222597-5-gourry@gourry.net> <6a9db6ff-2fe8-4be6-baba-7db7913898f2@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6a9db6ff-2fe8-4be6-baba-7db7913898f2@kernel.org> X-Rspamd-Queue-Id: 9707C40008 X-Rspamd-Server: rspam06 X-Stat-Signature: xk3h33ni6k5de1ni49oqyduup4hwzgjb X-Rspam-User: X-HE-Tag: 1768411715-944262 X-HE-Meta: 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 LvnRlNGi mlvgl4sIM0EXOcdIEGl2Z4/EvZsI00LBdbakO+ul5w3WX7+uCz6qBuQQYQbOBTz8svEOn6wiXjgAm/Cy2Po0tSYlkBFD7YEdS+x7lMBD8S2lwYD2cGO8/LjMjmMNAQcq717/HJuZ9Zs176hjgbzvcziTihgkDsSk5OBWycEXi4dO5ORXRe7b/vCkuOc2luWAnVqBMGcsyp8BgzjjI0HMguW3YAt1aLThHocrJvbsNuTrTnABVWyVumYxBmsWRBWZPSpTkcBROtEtn5KUMHdb8FM/z81fbGgJN7S9kQCXdZsmPLkNe+c3gvKjtZTn1o2NRsgGhPxRSwjAB1gHQSMg24+oMcgdyLGd54G0E7dKQxsilRX92CNsOtNBqP3J3dBnMTV9I 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 Wed, Jan 14, 2026 at 11:49:19AM +0100, David Hildenbrand (Red Hat) wrote: > 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() :) > Yeah i don't even end up using it, this is just cruft from early iterations. I'll clean it up. ~Gregory