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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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8ebdbdba-d0b5-4887-98e5-bc45f4565d51@lucifer.local> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260320_123429_205220_CA5A2EE0 X-CRM114-Status: GOOD ( 16.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B74FA1099B35 for ; Fri, 20 Mar 2026 19:34:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=acQIxbfyHsLya11o7c09zVmvKAizNubDUHMnpSBl89o=; b=zdm8mIcfXSulRW oCPEQ2350F1LRp0qUC6ze42KZI+rJyd5nvJxXHH+w1n85hdzkLaDJqHMV08FMSoKVu8BSs0JryY3+ wkSKJI//aG4z/1T/AQjyacSZYiRRlo4j/sUdHUHuyZQoNNo1Uf/MaSinpnEi3l4U4f/vVEEGJT5+I vFr2bIkD1si85Hkgk11hrXZUA2mqZ2CiLqnQTYGwBRRBOPHTzObDKm8tuAt7rVar+xyeTkM6bvins JSZ6SUAuQv60syZddBhz4ER39SeRCtHDiMJVpOWx/p0Hu1KK2nekiy9DgyVLwFKY0tQKTZQmziHVY 2meYPTWIkthdVnyw1KsQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w3fc7-0000000DSd0-2EJ4; Fri, 20 Mar 2026 19:34:31 +0000 Received: from mail-qt1-x833.google.com ([2607:f8b0:4864:20::833]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w3fc5-0000000DSc4-0JYW for linux-riscv@lists.infradead.org; Fri, 20 Mar 2026 19:34:30 +0000 Received: by mail-qt1-x833.google.com with SMTP id d75a77b69052e-506a747448dso8058981cf.0 for ; Fri, 20 Mar 2026 12:34:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1774035267; x=1774640067; darn=lists.infradead.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=SPJ27qWkI5c96vhdp37WS6c9O6xFfPoS9NHL0cnjclQ=; b=NZRDXPSdKE1JErnmCqTBGS91noxHo8TbmRuD8PSwbvS/4Ua2u/CtsK3N2aGAGh/V4G /e7JzcZT1vb779Ju1tPkpzzs9CGXLM93C70S89KmRat7l6Ji1W3M1gHZEngRvDscwwTg 7rHt6E3WiJL1deAAqm1IqDRNIo0+UjQ6eahakq6fEkqrR8otBOGHw2hjuAJ6QVdSXYuw tJ3sYwghkLQnmmBiAULPqO0TzFyPdqmx8iLlxpVQV24s5hU7FXj+OBltRuXhQWduzzxj 3uYvLPOfujw6Oa/FXLVMqNvLl9YcfGinqSn6DCpTwmRib0NuNf7vS2GiC9a8qPEOwlWy IZGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774035267; x=1774640067; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=SPJ27qWkI5c96vhdp37WS6c9O6xFfPoS9NHL0cnjclQ=; b=jEdR7YqeSGwd7ECBB848G7EzsAQta5qM8gMvKoXtUfXpDWugBbMLfOL5Aeq/o05kGP 85GKs9gjpcPCxgIUiLAV/dcxOgk17OfCKSUlPsVU8CVJUtfAuSTFJGIP+xHbQDaOU4+R 7wPpT/R0lWbtw0VRZzVkjHwcUEYsGXvsXePYLZPZiGzT9lhsSI4gcUPKfzvLiW7bmyip CW4HHX1cKEbFkeldqiDD/w7kRjcs7Iud4bDAJmHZVI15bQk3vhpX1YLVpbVdjlMitBDP OhRoSJydJurUotlmzg8CGH5YIuoJmRm27nUZkmA5pUF2qIt/YS3srBZU83BMElF7/OrU yO6g== X-Forwarded-Encrypted: i=1; AJvYcCVcLjDrmrSXeG/7EoIqa2UpSQrWYEb32T6YDNWvh/2acDv1EvqAzTzZl6nyH8e13sd9oSJYUhLPJk+5xg==@lists.infradead.org X-Gm-Message-State: AOJu0Yxw2Jw241jDwoQl9BQtVPNbehF3ChujGHzQQI1Pq3+HBNTZ6FPy E33GUvzw1rEP02Q2VUweyY0Xmu653t5i7OswpuiRTQ4PDBPFelhS3dqT60TPp1eNq0Y= X-Gm-Gg: ATEYQzxfIesTEgPnKlrF1JWBhUpwc20hlxfg0txD6oVfxCMYhzMK5A/68yfuT0nLvDm H8AM3Nuh3R9/6gDKZPaP2GaKCCcENIjwyupGyZVuexntTly6J/qtrVoZeepwaRdSQjiOiYzI49B RWdPHgWLwRElnQ0Tiy+YdHnij02a81YteUc2RcfdAJFKDsWBxw/hMpF5F084VWT+ZFM4hPszJ+v 4vEeF4YnlBIVGKk8OuUA2xvVNEkNbk8AsoIn6tdV7trEUfRngiVvip4AJW80XT0avOFFPznMtNe QeVrR98HYj57meN8gEmc+BbczGzs42DU612pPteUWxHErdFhSjCa//cNfJM4E6NOZknnB7Sntaw 9tUvVCLI/BjP8rN9M7V5+mCZ8mYXLsv3WhV/n3S0cyBpG/U283CnyNDS5aMzVHtgkMbJKhYYN6m 5dczaBmOfngENXLcmHcz7yAYE5BW68AUZFIizVRPtuP6CSDqc9k/ppg2DYE34bCzrXsOAAu0XJY /9vt661UDuYJRpHBHd+ X-Received: by 2002:a05:622a:4512:b0:50b:36e4:a614 with SMTP id d75a77b69052e-50b373ea96dmr54489661cf.6.1774035267172; Fri, 20 Mar 2026 12:34:27 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F (pool-96-255-20-138.washdc.ftas.verizon.net. [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> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <8ebdbdba-d0b5-4887-98e5-bc45f4565d51@lucifer.local> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260320_123429_204516_32D815C8 X-CRM114-Status: GOOD ( 14.41 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv