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 5DF3DC55838 for ; Thu, 6 Aug 2026 07:06:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5E7E06B0092; Thu, 6 Aug 2026 03:06:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5992C6B0093; Thu, 6 Aug 2026 03:06:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4AF696B0095; Thu, 6 Aug 2026 03:06:36 -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 2537B6B0092 for ; Thu, 6 Aug 2026 03:06:36 -0400 (EDT) Received: from smtpin27.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id AC31440686 for ; Thu, 6 Aug 2026 07:06:35 +0000 (UTC) X-FDA: 85069961550.27.0922134 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf26.hostedemail.com (Postfix) with ESMTP id 2B70F140004 for ; Thu, 6 Aug 2026 07:06:34 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="TwW+Ap/6"; spf=pass (imf26.hostedemail.com: domain of ljs@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ljs@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=1785999994; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=XcPioRNMll3r5OmjiUG/O8aq5a3hSQJFiegnJyFSvIo=; b=JFu+Ww80xId4DcP9lMsJtOe93GUfwKQnuQYcFgOGeWrKhqJzLl1wY7pZhCDZ6oqYs91H6Y NKGIz4Yh3jiXcbPXan4gmZm+gYU/SuWpVomL0MciRobjwGY5U9Wcg16J1PXgBaXT3PB78g Y2b9ysjx5729Xx5zwLbh1U57BHqsqwQ= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785999994; b=5tENt5hs1ts/Qn9ndudIGc7xkntK8wVFdgV9W9rkw3t7P08lT/hqWwuWNf4lf0V9TgTmoS i/82EBRbXIYxiijWp214eCtgsT4nGn26zZK5iAI0Yrm9nxClf92MBVoncAPAsviCMZxrWT MC6B2aXvngdaqEIZxffrHcnxiiAC0Jg= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="TwW+Ap/6"; spf=pass (imf26.hostedemail.com: domain of ljs@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ljs@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 3F4F060A64; Thu, 6 Aug 2026 07:06:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBE731F000E9; Thu, 6 Aug 2026 07:06:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785999993; bh=XcPioRNMll3r5OmjiUG/O8aq5a3hSQJFiegnJyFSvIo=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=TwW+Ap/66ZcREdQqckrwX9vkc4Z93jN+7IIPxPYOiPbMC7JQJLgHtNmGACiqreIOl 6VtKD+H1WXaB8vi7L7DUqflVCLVDxKlXaQOa27Y1xlE94I5MQBOCxaLpGxu8w95yxa nLR7i2qRWqCJjI04VZ4iK2rOwaTxETtqALN8uBB0LDAJipUR20/MLuflvSH4jZOaTt FA29yzKuOloFl8WVrOPL8Sah+FiTPLMEt4IBdUmubGhXtw99looSINmmGHL01wl69L MBjZU/REIsuooI/qb4X3q+UnhFlXJ4tn0gO4xtQOKfODXHmcQcBGGM/SzMw2jWtOmc oc1hySP12bYdg== Date: Thu, 6 Aug 2026 08:06:12 +0100 From: "Lorenzo Stoakes (ARM)" To: "Mike Rapoport (Microsoft)" Cc: Andrew Morton , Albert Ou , Alexandre Ghiti , Catalin Marinas , Danilo Krummrich , David Hildenbrand , Greg Kroah-Hartman , "Liam R. Howlett" , Michal Hocko , Palmer Dabbelt , Paul Walmsley , "Rafael J. Wysocki" , Suren Baghdasaryan , Vlastimil Babka , Will Deacon , driver-core@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH] drivers/base, mm: move arch_numa.c to mm/ Message-ID: References: <20260806-arch-numa-v1-1-968ec128121e@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260806-arch-numa-v1-1-968ec128121e@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 2B70F140004 X-Stat-Signature: 1f8rrjzig3zt4631nankr7fnjeypfs5h X-HE-Tag: 1785999994-549945 X-HE-Meta: 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 HAPI/TFm 7NpjJ6I+ElItCK6SVxW5n+5dODNMU64Y/kAOP2JBXi77pKNBvXsSKQB4YgRD9q/IRgrQwquA3XuBJMB2EFGpGycMZm+u4Rh5HhdfeOXCt+BHjOLQhNOaB+S1rC1ORq5EJ1ku5v0KiJvBQ3kobo00RxM+kV3XHPe5Luptn7+eJYSnGkMMjT/OGUeQhl68J2Sj5YSsVDN2A4elQ0CutOgoduh1qZkM+ekV4jVn0PuPcnHCNgNmeGfqxRgWINFD0+5clly6OBXL3BNZLE4EigO3hTiU7bnLCidXZoD6N0tqAti3IvR0jRd+/OEhnJKZmh1Vm1LagrSSZEXveLhuuigAdE6YjnL/ZPuWfU8UTfpQhe1faj1k= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Aug 06, 2026 at 09:58:38AM +0300, Mike Rapoport (Microsoft) wrote: > arch_numa.c implements boot time discovery and initialization of NUMA > topology on architectures that select GENERIC_ARCH_NUMA (currently arm64 > and riscv). > > Since this is step in the initialization of the memory management > subsystem, it's logical to have arch_numa.c in mm/ alongside numa.c, > numa_memblks.c and numa_emulation.c. > > Move arch_numa.c to mm/ and add its F: entry to "MEMBLOCK AND MEMORY > MANAGEMENT INITIALIZATION" in MAINTAINERS. > > Signed-off-by: Mike Rapoport (Microsoft) Everything is proceeding as I have foreseen... soon we shall have control of all of the kernel! ;) Acked-by: Lorenzo Stoakes (ARM) > --- > MAINTAINERS | 1 + > drivers/base/Kconfig | 7 ------- > drivers/base/Makefile | 1 - > mm/Kconfig | 7 +++++++ > mm/Makefile | 1 + > {drivers/base => mm}/arch_numa.c | 0 > 6 files changed, 9 insertions(+), 8 deletions(-) > > diff --git a/MAINTAINERS b/MAINTAINERS > index 5114e6db7307..465b64f8e93c 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -16880,6 +16880,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git fixes > F: Documentation/core-api/boot-time-mm.rst > F: include/linux/kho/abi/memblock.h > F: include/linux/memblock.h > +F: mm/arch_numa.c > F: mm/bootmem_info.c > F: mm/memblock.c > F: mm/memtest.c > diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig > index f7d385cbd3ba..1d93bfc34490 100644 > --- a/drivers/base/Kconfig > +++ b/drivers/base/Kconfig > @@ -239,13 +239,6 @@ config GENERIC_ARCH_TOPOLOGY > appropriate scaling, sysfs interface for reading capacity values at > runtime. > > -config GENERIC_ARCH_NUMA > - bool > - select NUMA_MEMBLKS > - help > - Enable support for generic NUMA implementation. Currently, RISC-V > - and ARM64 use it. > - > config FW_DEVLINK_SYNC_STATE_TIMEOUT > bool "sync_state() behavior defaults to timeout instead of strict" > help > diff --git a/drivers/base/Makefile b/drivers/base/Makefile > index 8074a10183dc..435710f643a5 100644 > --- a/drivers/base/Makefile > +++ b/drivers/base/Makefile > @@ -25,7 +25,6 @@ obj-$(CONFIG_PINCTRL) += pinctrl.o > obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o > obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o > obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o > -obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o > obj-$(CONFIG_ACPI) += physical_location.o > > obj-y += test/ > diff --git a/mm/Kconfig b/mm/Kconfig > index 9e0ca4824905..410b8a0a92b9 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -1469,6 +1469,13 @@ config NUMA_EMU > into virtual nodes when booted with "numa=fake=N", where N is the > number of nodes. This is only useful for debugging. > > +config GENERIC_ARCH_NUMA > + bool > + select NUMA_MEMBLKS > + help > + Enable support for generic NUMA implementation. Currently, RISC-V > + and ARM64 use it. > + > config ARCH_HAS_USER_SHADOW_STACK > bool > help > diff --git a/mm/Makefile b/mm/Makefile > index eff9f9e7e061..fd29be716fa8 100644 > --- a/mm/Makefile > +++ b/mm/Makefile > @@ -122,6 +122,7 @@ obj-$(CONFIG_CMA) += cma.o > obj-$(CONFIG_NUMA) += numa.o > obj-$(CONFIG_NUMA_MEMBLKS) += numa_memblks.o > obj-$(CONFIG_NUMA_EMU) += numa_emulation.o > +obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o > obj-$(CONFIG_BALLOON) += balloon.o > obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o > obj-$(CONFIG_PAGE_TABLE_CHECK) += page_table_check.o > diff --git a/drivers/base/arch_numa.c b/mm/arch_numa.c > similarity index 100% > rename from drivers/base/arch_numa.c > rename to mm/arch_numa.c > > --- > base-commit: 075b74841bd0065a3bda3440873c747938e69b68 > change-id: 20260806-arch-numa-444bb4806114 > > -- > Sincerely yours, > Mike. > -- Cheers, Lorenzo