From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 748E73ED5C6; Thu, 19 Mar 2026 16:34:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773938057; cv=none; b=EGLKykmaI9Z4BTdhfsQtb1WWbYJmmLNX0CGFhwOsLEv4mR6liiL/WUyWvO34pDEx+ILEvSfqLBXvWjifFbImYgKf7B5tpE1WQGZ1ibzhzgRSh0gDs/VHYAWWmrHRh5tHpkPUK3dnvIqsRvkhtKyQ/D4QgaFCXQn6T540ek4H4Nc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773938057; c=relaxed/simple; bh=We2az9rV2uZhEm2AbxZxzNYfpPMKfj/UCTlthMox8c8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QaVoK2Hoa7o5W/gCJV0GvXVgP0qcIxTPQD0XNeckkr5q/sbY+4gWCSPm/WY5mjybec2ZZykXBe28rOOpQPfk8CTeP84EkmFECXEB+EnDEV1BTW/gkNTpWp1rmun22/irO0teXO3jk9Bp2gF2k5I+TRfu/ckiT58chM3tCkdLD5w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AL2p7D4n; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AL2p7D4n" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6525C19424; Thu, 19 Mar 2026 16:34:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773938057; bh=We2az9rV2uZhEm2AbxZxzNYfpPMKfj/UCTlthMox8c8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=AL2p7D4nNNuwVwc7Lph39O0JFakdkYyaKrzGaPHTF2GlW3nDaBEjsMovt8IMS1cvj nF/Y3zcnq4HLceLlcb6ZNa8uwOSPS9SWkhVjLMbig3i7KtVn/sUAbfmVPQesBc+smm 1em/bPnI5cwFnbtL9+1T0wOIIFyaOYswLb8TV3Jrtgd9OpVCyzRy0/2cXUKGL7tmOg p/vGe+nw48VyFu5vUn7QxEbTeLZzSpoqZVdkf5aZk90hZ1WePMNrOHlWOcl6wQkke1 ZJTW5adr2V3cuwzpxHwFD5YXGP9Xk9BnMlUdpEnaAU+qap2KVjtghs04ibjGQEjgmW /TmfbXYeRDlPg== Date: Thu, 19 Mar 2026 16:34:04 +0000 From: "Lorenzo Stoakes (Oracle)" To: Gregory Price 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: <8ebdbdba-d0b5-4887-98e5-bc45f4565d51@lucifer.local> References: <20260319-config_migration-v1-0-42270124966f@kernel.org> <20260319-config_migration-v1-1-42270124966f@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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) > > Reviewed-by: Gregory Price > > ~Gregory Cheers, Lorenzo