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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90C9FC4332F for ; Mon, 31 Jan 2022 09:41:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E45CB6B0073; Mon, 31 Jan 2022 04:41:31 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DCF316B0074; Mon, 31 Jan 2022 04:41:31 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C70726B0075; Mon, 31 Jan 2022 04:41:31 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0178.hostedemail.com [216.40.44.178]) by kanga.kvack.org (Postfix) with ESMTP id B96706B0073 for ; Mon, 31 Jan 2022 04:41:31 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 7D442181D46EE for ; Mon, 31 Jan 2022 09:41:31 +0000 (UTC) X-FDA: 79090089582.24.5011853 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by imf02.hostedemail.com (Postfix) with ESMTP id E534D80005 for ; Mon, 31 Jan 2022 09:41:30 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id D40441F386; Mon, 31 Jan 2022 09:41:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1643622089; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=JzKQsvVlnpndbALvMTXcll7uzoa8T8eje3Q/bEI6mLM=; b=whj9BP6WhckdM25U/uFRLjh/5qEA3XBP2rJPmH/OFUiuQqSEmH4Kse73Ly2XNl7aeGy0D3 01nHUqxo5dFMLh/5OT1osDi6I//FYqxJOBWDlV7Pa2kDxDqS7SZU6eGFbFwhiIxa2yrWJn q2KzYMXrYzBSbk968nxUdzIBj5Xav5c= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1643622089; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=JzKQsvVlnpndbALvMTXcll7uzoa8T8eje3Q/bEI6mLM=; b=hfnhf0Ax+T4HdOjPQUboSd+ahGSEWUJYPr8iA9X+hUzJN0iQJC+aThno6atUOIFQQBrLSh W6EpHbrVTLIU+YBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 366CE13B68; Mon, 31 Jan 2022 09:41:28 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 2RKbCsiu92FODwAAMHmgww (envelope-from ); Mon, 31 Jan 2022 09:41:28 +0000 Date: Mon, 31 Jan 2022 10:41:26 +0100 From: Oscar Salvador To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Greg Kroah-Hartman , Michal Hocko , Catalin Marinas , Will Deacon , Thomas Bogendoerfer , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Yoshinori Sato , Rich Felker , "David S. Miller" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "Rafael J. Wysocki" , x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org Subject: Re: [PATCH RFC v1] drivers/base/node: consolidate node device subsystem initialization in node_dev_init() Message-ID: <20220131094125.GB15392@linux> References: <20220128151540.164759-1-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220128151540.164759-1-david@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Queue-Id: E534D80005 X-Rspam-User: nil Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=whj9BP6W; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=hfnhf0Ax; dmarc=pass (policy=none) header.from=suse.de; spf=pass (imf02.hostedemail.com: domain of osalvador@suse.de designates 195.135.220.29 as permitted sender) smtp.mailfrom=osalvador@suse.de X-Stat-Signature: j8ftajrfc8tqt3wqufn9x75khqr39s7w X-Rspamd-Server: rspam08 X-HE-Tag: 1643622090-709858 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Jan 28, 2022 at 04:15:40PM +0100, David Hildenbrand wrote: > ... and call node_dev_init() after memory_dev_init() from driver_init(), > so before any of the existing arch/subsys calls. All online nodes should > be known at that point. > > This is in line with memory_dev_init(), which initializes the memory > device subsystem and creates all memory block devices. > > Similar to memory_dev_init(), panic() if anything goes wrong, we don't > want to continue with such basic initialization errors. > > The important part is that node_dev_init() gets called after > memory_dev_init() and after cpu_dev_init(), but before any of the > relevant archs call register_cpu() to register the new cpu device under > the node device. The latter should be the case for the current users > of topology_init(). > > Cc: Andrew Morton > Cc: Greg Kroah-Hartman > Cc: Michal Hocko > Cc: Oscar Salvador > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Thomas Bogendoerfer > Cc: Michael Ellerman > Cc: Benjamin Herrenschmidt > Cc: Paul Mackerras > Cc: Paul Walmsley > Cc: Palmer Dabbelt > Cc: Albert Ou > Cc: Heiko Carstens > Cc: Vasily Gorbik > Cc: Yoshinori Sato > Cc: Rich Felker > Cc: "David S. Miller" > Cc: Thomas Gleixner > Cc: Ingo Molnar > Cc: Borislav Petkov > Cc: Dave Hansen > Cc: "Rafael J. Wysocki" > Cc: x86@kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Cc: linux-ia64@vger.kernel.org > Cc: linux-mips@vger.kernel.org > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux-riscv@lists.infradead.org > Cc: linux-s390@vger.kernel.org > Cc: linux-sh@vger.kernel.org > Cc: sparclinux@vger.kernel.org > Cc: linux-mm@kvack.org > Signed-off-by: David Hildenbrand Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs