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=unavailable 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 BA291C2D0E4 for ; Tue, 17 Nov 2020 15:29:20 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D9C15221E2 for ; Tue, 17 Nov 2020 15:29:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D9C15221E2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4Cb8xR695fzDqN7 for ; Wed, 18 Nov 2020 02:29:15 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=suse.de (client-ip=195.135.220.15; helo=mx2.suse.de; envelope-from=osalvador@suse.de; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.de Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Cb8tz4sQCzDq9H for ; Wed, 18 Nov 2020 02:27:07 +1100 (AEDT) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 81342AC1F; Tue, 17 Nov 2020 15:27:04 +0000 (UTC) Date: Tue, 17 Nov 2020 16:27:02 +0100 From: Oscar Salvador To: David Hildenbrand Subject: Re: [PATCH v2 3/8] powerpc/mm: factor out creating/removing linear mapping Message-ID: <20201117152701.GC15987@linux> References: <20201111145322.15793-1-david@redhat.com> <20201111145322.15793-4-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201111145322.15793-4-david@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Hocko , Wei Yang , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Paul Mackerras , Rashmica Gupta , linuxppc-dev@lists.ozlabs.org, Andrew Morton , Mike Rapoport Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, Nov 11, 2020 at 03:53:17PM +0100, David Hildenbrand wrote: > We want to stop abusing memory hotplug infrastructure in memtrace code > to perform allocations and remove the linear mapping. Instead we will use > alloc_contig_pages() and remove the linear mapping manually. > > Let's factor out creating/removing the linear mapping into > arch_create_linear_mapping() / arch_remove_linear_mapping() - so in the > future, we might be able to have whole arch_add_memory() / > arch_remove_memory() be implemented in common code. > > Cc: Michael Ellerman > Cc: Benjamin Herrenschmidt > Cc: Paul Mackerras > Cc: Rashmica Gupta > Cc: Andrew Morton > Cc: Mike Rapoport > Cc: Michal Hocko > Cc: Oscar Salvador > Cc: Wei Yang > Signed-off-by: David Hildenbrand Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE L3