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 90EF9C56202 for ; Tue, 17 Nov 2020 15:27:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 01C6524631 for ; Tue, 17 Nov 2020 15:27:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 01C6524631 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 650BA6B0070; Tue, 17 Nov 2020 10:27:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5FF1F6B0071; Tue, 17 Nov 2020 10:27:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 53D396B0072; Tue, 17 Nov 2020 10:27:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0185.hostedemail.com [216.40.44.185]) by kanga.kvack.org (Postfix) with ESMTP id 264A96B0070 for ; Tue, 17 Nov 2020 10:27:07 -0500 (EST) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id ABFCE362A for ; Tue, 17 Nov 2020 15:27:06 +0000 (UTC) X-FDA: 77494288452.06.team51_011286e27332 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin06.hostedemail.com (Postfix) with ESMTP id 5BA5A10042990 for ; Tue, 17 Nov 2020 15:27:06 +0000 (UTC) X-HE-Tag: team51_011286e27332 X-Filterd-Recvd-Size: 2426 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf01.hostedemail.com (Postfix) with ESMTP for ; Tue, 17 Nov 2020 15:27:05 +0000 (UTC) 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 Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rashmica Gupta , Andrew Morton , Mike Rapoport , Michal Hocko , Wei Yang 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-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 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