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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2CA92CE79AB for ; Wed, 20 Sep 2023 07:30:51 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qirfO-00059C-VG; Wed, 20 Sep 2023 03:30:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qirfB-00054j-TO for qemu-devel@nongnu.org; Wed, 20 Sep 2023 03:30:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qirfA-0003cL-9H for qemu-devel@nongnu.org; Wed, 20 Sep 2023 03:30:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1695195018; h=from:from:reply-to:subject:subject: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=i2WgtYybkbUsFYRJOW6P1Ah19uLIKqMGatOtx6TDY7A=; b=CZH6YNNnlLKF3zyP7+QoAWV3tQCnHilc2fVBPX2cqLAGU9h/TxeEjaDGhFIpoU51MPqd5z hKcBDR30bKG2OqxJQhiFHdrXzJCpnqkf71+lC98WxiApknSwnXcJ0m/Xv9AdQFsqc+KJWl m++YEQuADV7ojONMztTRUH5Z7NMaUrw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-380-T5PUNI4cOF6P-f6nkHOiTg-1; Wed, 20 Sep 2023 03:30:13 -0400 X-MC-Unique: T5PUNI4cOF6P-f6nkHOiTg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2BFD1185A797; Wed, 20 Sep 2023 07:30:13 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 04D25C15BB8; Wed, 20 Sep 2023 07:30:13 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id F35FE21E6900; Wed, 20 Sep 2023 09:30:11 +0200 (CEST) From: Markus Armbruster To: Xiaoyao Li Cc: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S. Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Cornelia Huck , Daniel P. =?utf-8?Q?Berrang=C3=A9?= , Eric Blake , Marcelo Tosatti , qemu-devel@nongnu.org, kvm@vger.kernel.org, Michael Roth , isaku.yamahata@gmail.com, Sean Christopherson , Claudio Fontana Subject: Re: [RFC PATCH v2 03/21] HostMem: Add private property and associate it with RAM_KVM_GMEM References: <20230914035117.3285885-1-xiaoyao.li@intel.com> <20230914035117.3285885-4-xiaoyao.li@intel.com> <8734zazeag.fsf@pond.sub.org> Date: Wed, 20 Sep 2023 09:30:11 +0200 In-Reply-To: (Xiaoyao Li's message of "Wed, 20 Sep 2023 07:24:06 +0800") Message-ID: <878r91nvy4.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Xiaoyao Li writes: > On 9/19/2023 5:46 PM, Markus Armbruster wrote: >> Xiaoyao Li writes: >> >>> From: Isaku Yamahata >>> >>> Add a new property "private" to memory backends. When it's set to true, >>> it indicates the RAMblock of the backend also requires kvm gmem. >> Can you add a brief explanation why you need the property? > > It provides a mechanism for user to specify whether the memory can serve as private memory (need request kvm gmem). Yes, but why would a user want such memory?