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 X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67175C4727C for ; Thu, 1 Oct 2020 13:51:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F49A2137B for ; Thu, 1 Oct 2020 13:51:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732322AbgJANvt (ORCPT ); Thu, 1 Oct 2020 09:51:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:44764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732018AbgJANvs (ORCPT ); Thu, 1 Oct 2020 09:51:48 -0400 Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 09F542087D; Thu, 1 Oct 2020 13:51:46 +0000 (UTC) Date: Thu, 1 Oct 2020 14:51:44 +0100 From: Catalin Marinas To: Anshuman Khandual Cc: linux-arm-kernel@lists.infradead.org, will@kernel.org, gshan@redhat.com, Mark Rutland , Marc Zyngier , Steve Capper , Mark Brown , linux-kernel@vger.kernel.org Subject: Re: [PATCH V4 1/3] arm64/mm/hotplug: Register boot memory hot remove notifier earlier Message-ID: <20201001135144.GF21544@gaia> References: <1601387687-6077-1-git-send-email-anshuman.khandual@arm.com> <1601387687-6077-2-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1601387687-6077-2-git-send-email-anshuman.khandual@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 29, 2020 at 07:24:45PM +0530, Anshuman Khandual wrote: > This moves memory notifier registration earlier in the boot process from > device_initcall() to early_initcall() which will help in guarding against > potential early boot memory offline requests. Even though there should not > be any actual offlinig requests till memory block devices are initialized > with memory_dev_init() but then generic init sequence might just change in > future. Hence an early registration for the memory event notifier would be > helpful. While here, just skip the registration if CONFIG_MEMORY_HOTREMOVE > is not enabled and also call out when memory notifier registration fails. > > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Mark Rutland > Cc: Marc Zyngier > Cc: Steve Capper > Cc: Mark Brown > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Reviewed-by: Gavin Shan > Signed-off-by: Anshuman Khandual Reviewed-by: Catalin Marinas