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charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200813075420.GC975@Air-de-Roger> X-Operating-System: Linux phenom 5.7.0-1-amd64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 13, 2020 at 09:54:20AM +0200, Roger Pau Monné wrote: > On Thu, Aug 13, 2020 at 08:33:37AM +0100, Christoph Hellwig wrote: > > On Tue, Aug 11, 2020 at 11:44:47AM +0200, Roger Pau Monne wrote: > > > If enabled (because ZONE_DEVICE is supported) the usage of the new > > > functionality untangles Xen balloon and RAM hotplug from the usage of > > > unpopulated physical memory ranges to map foreign pages, which is the > > > correct thing to do in order to avoid mappings of foreign pages depend > > > on memory hotplug. > > > > So please just select ZONE_DEVICE if this is so much better rather > > than maintaining two variants. > > We still need to other variant for Arm at least, so both need to be > maintained anyway, even if we force ZONE_DEVICE on x86. Why does arm not have ZONE_DEVICE? -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch 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=-3.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 62D37C433DF for ; Thu, 13 Aug 2020 09:49:52 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 16F722074D for ; Thu, 13 Aug 2020 09:49:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="lWi1FzHH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16F722074D Authentication-Results: mail.kernel.org; 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Thu, 13 Aug 2020 02:49:48 -0700 (PDT) Date: Thu, 13 Aug 2020 11:49:46 +0200 From: Daniel Vetter To: Roger Pau =?iso-8859-1?Q?Monn=E9?= Subject: Re: [PATCH v4 2/2] xen: add helpers to allocate unpopulated memory Message-ID: <20200813094946.GJ2352366@phenom.ffwll.local> Mail-Followup-To: Roger Pau =?iso-8859-1?Q?Monn=E9?= , Christoph Hellwig , linux-kernel@vger.kernel.org, Oleksandr Andrushchenko , David Airlie , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Dan Carpenter , Wei Liu , Yan Yankovskyi , dri-devel@lists.freedesktop.org, xen-devel@lists.xenproject.org, linux-mm@kvack.org, David Hildenbrand , Michal Hocko , Dan Williams References: <20200811094447.31208-1-roger.pau@citrix.com> <20200811094447.31208-3-roger.pau@citrix.com> <20200813073337.GA16160@infradead.org> <20200813075420.GC975@Air-de-Roger> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200813075420.GC975@Air-de-Roger> X-Operating-System: Linux phenom 5.7.0-1-amd64 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Stefano Stabellini , Wei Liu , Oleksandr Andrushchenko , David Airlie , Yan Yankovskyi , David Hildenbrand , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Michal Hocko , Christoph Hellwig , linux-mm@kvack.org, xen-devel@lists.xenproject.org, Boris Ostrovsky , Dan Williams , Dan Carpenter Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, Aug 13, 2020 at 09:54:20AM +0200, Roger Pau Monn=E9 wrote: > On Thu, Aug 13, 2020 at 08:33:37AM +0100, Christoph Hellwig wrote: > > On Tue, Aug 11, 2020 at 11:44:47AM +0200, Roger Pau Monne wrote: > > > If enabled (because ZONE_DEVICE is supported) the usage of the new > > > functionality untangles Xen balloon and RAM hotplug from the usage of > > > unpopulated physical memory ranges to map foreign pages, which is the > > > correct thing to do in order to avoid mappings of foreign pages depend > > > on memory hotplug. > > = > > So please just select ZONE_DEVICE if this is so much better rather > > than maintaining two variants. > = > We still need to other variant for Arm at least, so both need to be > maintained anyway, even if we force ZONE_DEVICE on x86. Why does arm not have ZONE_DEVICE? -Daniel -- = Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel