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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-50b36d23237sm33063701cf.13.2026.03.20.12.34.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2026 12:34:26 -0700 (PDT) Date: Fri, 20 Mar 2026 15:34:24 -0400 From: Gregory Price To: "Lorenzo Stoakes (Oracle)" Cc: "David Hildenbrand (Arm)" , linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Ying Huang , Alistair Popple , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE Message-ID: References: <20260319-config_migration-v1-0-42270124966f@kernel.org> <20260319-config_migration-v1-1-42270124966f@kernel.org> <8ebdbdba-d0b5-4887-98e5-bc45f4565d51@lucifer.local> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8ebdbdba-d0b5-4887-98e5-bc45f4565d51@lucifer.local> On Thu, Mar 19, 2026 at 04:34:04PM +0000, Lorenzo Stoakes (Oracle) wrote: > On Thu, Mar 19, 2026 at 11:24:27AM -0400, Gregory Price wrote: > > On Thu, Mar 19, 2026 at 09:19:40AM +0100, David Hildenbrand (Arm) wrote: > > > All architectures that select CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE also > > > select CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG. So we can just remove > > > CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE. > > > > > > For CONFIG_MIGRATION, make it depend on CONFIG_MEMORY_HOTREMOVE instead, > > > and make CONFIG_MEMORY_HOTREMOVE select CONFIG_MIGRATION (just like > > > CONFIG_CMA and CONFIG_COMPACTION already do). > > > > > > We'll clean up CONFIG_MIGRATION next. > > > > > > Signed-off-by: David Hildenbrand (Arm) > > > > HOTREMOVE has long been a thorn in my side, I appreciate you cleaning > > this up. > > That is quite the HOTTAKE young Gregory! > > (It seems my pun crimes are continuing) > :P - it's just more config cruft that always catches me cross-platform when i poke around in dax and hotplug. It'll be nice to get less automated reports from CI lol ~Gregory