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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id n14sm1094611edw.38.2020.12.02.04.30.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Dec 2020 04:30:19 -0800 (PST) Subject: Re: [PATCH 00/18] qapi/qom: QAPIfy object-add To: Kevin Wolf References: <20201130154605.GC5078@merkur.fritz.box> <20201130181037.GG5078@merkur.fritz.box> <65a9600f-ca8c-ef29-94d8-d9ea114e5e06@redhat.com> <20201201162042.GB6264@merkur.fritz.box> <20201201193528.GC6264@merkur.fritz.box> <3449b5d6-d094-84c8-a0ea-4cd25364db2d@redhat.com> <20201201220854.GC3836@habkost.net> <17afbbfe-209f-e4b2-e9e1-b50abe1fce3c@redhat.com> <20201202103824.GB16765@merkur.fritz.box> From: Paolo Bonzini Message-ID: <0a904bef-6341-f950-3f8c-4170c7ba6af8@redhat.com> Date: Wed, 2 Dec 2020 13:30:18 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201202103824.GB16765@merkur.fritz.box> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.495, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, thuth@redhat.com, pkrempa@redhat.com, berrange@redhat.com, Eduardo Habkost , qemu-block@nongnu.org, libvir-list@redhat.com, armbru@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com, kraxel@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 02/12/20 11:38, Kevin Wolf wrote: > Am 02.12.2020 um 10:30 hat Paolo Bonzini geschrieben: >> On 01/12/20 23:08, Eduardo Habkost wrote: >>>> Properties are only a useful concept if they have a use. If >>>> -object/object_add/object-add can do the same job without properties, >>>> properties are not needed anymore. >>> >>> Do you mean "not needed for -object anymore"? Properties are >>> still used by internal C code (esp. board code), >>> -device/device_add, -machine, -cpu, and debugging commands (like >>> "info qtree" and qom-list/qom-get/qom-set). >> >> Yes. > > Are internal uses mostly just right after object creation, or do we make > a lot of use of them during runtime? Not "a lot" but enough to be nasty. There are a couple uses of "well-known" QOM properties (e.g. to access the RTC time or the balloon stats), plus "info qtree". Paolo