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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 488071075273 for ; Thu, 19 Mar 2026 08:20:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 727076B042D; Thu, 19 Mar 2026 04:20:12 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6F9D66B042E; Thu, 19 Mar 2026 04:20:12 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 637206B042F; Thu, 19 Mar 2026 04:20:12 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 53A606B042D for ; Thu, 19 Mar 2026 04:20:12 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id E475213ACC8 for ; Thu, 19 Mar 2026 08:20:11 +0000 (UTC) X-FDA: 84562115022.03.A41C20D Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf09.hostedemail.com (Postfix) with ESMTP id 2599514000A for ; Thu, 19 Mar 2026 08:20:09 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=nW9ab7On; spf=pass (imf09.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1773908410; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=9vONOIrqW/UJkG8W01y5FtYV4fnBAGfruHFEOeSnnYw=; b=OFxcFkjYHS9UH6o/d86pggowitRLYWZi88xQqf9GC3RBWIkh1IhdGKChLdL5xhBp4O04N4 3/93CRoR/ew3AES+KTSpc0wlLOVLjVDOwrT0oryUX1PrLB65oPLYNiJ3Xkg3ucKu31CCRb w0Air2wBUs73FTGcxiWkSablXSlrRVQ= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=nW9ab7On; spf=pass (imf09.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773908410; a=rsa-sha256; cv=none; b=07E/jtzaO6B5Zg/Ae97g9g6Jxs8ujc9Z+Bpqzk77CnMB46xJotQydCFcgRJkUdXbZaAS3P 9kAumIidlQqGaKdgNARCMfVDTttSLNlKMErWiC5AePRr5BRfaBD0g2emR0w9M/Y19bgCqb pPVagq0bAEtpeGSoF505I/PBjD7ReeQ= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 1E02D43D39; Thu, 19 Mar 2026 08:20:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4E3B1C19424; Thu, 19 Mar 2026 08:19:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773908409; bh=GAQ9b9edKTgGxU+mpQzf5vrvp0GbZiNpB68nUzbzDyY=; h=From:Subject:Date:To:Cc:From; b=nW9ab7OnkN7S00RxQQ6fV539CUU/HXaHfFwpCsfjk1vZa9nrCehAKXmvHkrdByEwi UTuF8w219c0gp/9PlGkyTjPCXYgHMu+wuB+VcuJDOAEMR4YYArxHQyQe1bdwRE69iq 6KnzMuHTxJ83BywVs82C5DCGxHXYPZw/XiMZC3jCTCs7Ed7M20epXUlpSA58uZXblU VhVWCftNRHTP6Wysxkep+z8UHXRrW+AIwQJO/Iq01wPPGebHyKnPiUVOyGVPTWywxV gA0MkkSVRuNWrkUsu2BUt2gfc0ropCqtacyuIkXHK1ZCQaGyBOonZgNXG1/Y1ey4xt IYgm8NZf2LthQ== From: "David Hildenbrand (Arm)" Subject: [PATCH 0/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION Date: Thu, 19 Mar 2026 09:19:39 +0100 Message-Id: <20260319-config_migration-v1-0-42270124966f@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAJuxu2kC/x2MQQqAIBAAvxJ7TlhNjPpKRISttocsNCIQ/550H JiZDIkiU4KxyRDp4cRnqCDbBuy+Bk+Ct8qgUBnsZC/sGRz75WAf17vKQpuOFGpEPQxQsyuS4/d fTnMpH8Y9x3JiAAAA To: linux-kernel@vger.kernel.org Cc: 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 , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , 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, "David Hildenbrand (Arm)" X-Mailer: b4 0.13.0 X-Rspamd-Queue-Id: 2599514000A X-Stat-Signature: 8an3ae7b7zbnaqy17trdxat1xb9nyzzh X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1773908409-588355 X-HE-Meta: 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 LkVoa7Y8 ziKHiPPizJsStJfdWoXH1jckkZh5DIcfA+sbTqwYDCwZmu7YvdAeK5eQcqAVUwjSykdQRr1SwwDhz6YT9KNXUJHTh4mETNLsZehhd96qIa0pibnjfe2D0yvYakECmuaDZMUwZ0jPQvoLcBfVkXn/Wrcp8NUexVxFNeZc/3EdwXDSR8q7mBxFeeEcLkAHtwz0O88lsx57faA9AlG3aocjGFahxt0LMnWyPxjEFsjxuaZAEXp6i4KjU6dOremjCk52RA/x/Vxs/CV0Z4ixVBbIFnnu6nzJY8ZzAyIAyxDDinYE95mtVH8RNAU6fjw08XQo9hZ83alm/DZOZY5Jvxq7t1Ybt5qiLdPxtlrFBNxweAuYRLqM= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: While working on memory hotplug code cleanups, I realized that CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE is not really required anymore. Changing that revealed some rather nasty looking CONFIG_MIGRATION handling. Let's clean that up by introducing a dedicated CONFIG_NUMA_MIGRATION option and reducing the dependencies that CONFIG_MIGRATION has. Heavily cross compiled. I assume these changes are fine, but messing with kconfig sometimes feels like playing with fire :) Signed-off-by: David Hildenbrand (Arm) --- David Hildenbrand (Arm) (2): mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE mm: introduce CONFIG_NUMA_MIGRATION and simplify CONFIG_MIGRATION arch/arm64/Kconfig | 1 - arch/loongarch/Kconfig | 1 - arch/powerpc/Kconfig | 1 - arch/riscv/Kconfig | 1 - arch/s390/Kconfig | 1 - arch/x86/Kconfig | 1 - include/linux/memory-tiers.h | 2 +- init/Kconfig | 2 +- mm/Kconfig | 33 +++++++++++++++------------------ mm/memory-tiers.c | 12 ++++++------ mm/mempolicy.c | 2 +- mm/migrate.c | 5 ++--- 12 files changed, 26 insertions(+), 36 deletions(-) --- base-commit: fbf55982f31ae6aa11f890c36bccc130ce70a312 change-id: 20260317-config_migration-463e20400499 Best regards, -- David Hildenbrand (Arm)