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envelope-from=vsementsov@virtuozzo.com; helo=EUR05-AM6-obe.outbound.protection.outlook.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, NICE_REPLY_A=-0.094, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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: Kevin Wolf , Kashyap Chamarthy , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 20.01.2021 16:51, Alberto Garcia wrote: > On Mon 18 Jan 2021 11:22:49 AM CET, Vladimir Sementsov-Ogievskiy wrote: >>> This is still an RFC but you can see the idea. >> >> Good idea and I glad to see that my patches help:) >> >> Hmm, still, removing a filter which want to unshare WRITE even when >> doesn't have any parents will be a problem anyway, so we'll need a new >> command to drop filter with a logic like in bdrv_drop_filter in my >> series. > > Do you have an example? > backup_top filter -- Best regards, Vladimir