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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 608EEC433E1 for ; Thu, 14 May 2020 09:10:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1DC4C20675 for ; Thu, 14 May 2020 09:10:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iIZPHDKz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DC4C20675 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42698 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jZ9sx-0003mP-97 for qemu-devel@archiver.kernel.org; Thu, 14 May 2020 05:10:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57188) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jZ9sK-0003Bp-O1 for qemu-devel@nongnu.org; Thu, 14 May 2020 05:09:56 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:37103 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jZ9sK-0001oh-1b for qemu-devel@nongnu.org; Thu, 14 May 2020 05:09:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589447395; 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:autocrypt:autocrypt; bh=l5ELCOPW9P3WWO3h4+uj5TQwiz+Bp03CSC3PIOG1zlE=; b=iIZPHDKz+5Q9vLAy1abb/vba6Vfkq4u3M7f34ANO/RUxIO4kn/DQyNUlkbvbWxtfcMnFiO DYBvYyFQj/vZ0TGuFmtfJCVBfdqhkppaZMIVsSeY8Hm5hJZMW0yORbbI9ZI8dmRv8/ee23 ucFRWyfVQeXphn8cy46aywxr5DgoOII= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-333-dPoj0SpmOHaItQWyQs-4Pw-1; Thu, 14 May 2020 05:09:53 -0400 X-MC-Unique: dPoj0SpmOHaItQWyQs-4Pw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7D1C0800053; Thu, 14 May 2020 09:09:52 +0000 (UTC) Received: from dresden.str.redhat.com (ovpn-113-212.ams2.redhat.com [10.36.113.212]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E71F160C05; Thu, 14 May 2020 09:09:50 +0000 (UTC) Subject: Re: [RFC v2] migration: Add migrate-set-bitmap-node-mapping To: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org References: <20200513145610.1484567-1-mreitz@redhat.com> <6a82008b-d272-82f2-a8a1-615437abcda7@virtuozzo.com> From: Max Reitz Autocrypt: addr=mreitz@redhat.com; prefer-encrypt=mutual; keydata= mQENBFXOJlcBCADEyyhOTsoa/2ujoTRAJj4MKA21dkxxELVj3cuILpLTmtachWj7QW+TVG8U /PsMCFbpwsQR7oEy8eHHZwuGQsNpEtNC2G/L8Yka0BIBzv7dEgrPzIu+W3anZXQW4702+uES U29G8TP/NGfXRRHGlbBIH9KNUnOSUD2vRtpOLXkWsV5CN6vQFYgQfFvmp5ZpPeUe6xNplu8V mcTw8OSEDW/ZnxJc8TekCKZSpdzYoxfzjm7xGmZqB18VFwgJZlIibt1HE0EB4w5GsD7x5ekh awIe3RwoZgZDLQMdOitJ1tUc8aqaxvgA4tz6J6st8D8pS//m1gAoYJWGwwIVj1DjTYLtABEB AAG0HU1heCBSZWl0eiA8bXJlaXR6QHJlZGhhdC5jb20+iQFTBBMBCAA9AhsDBQkSzAMABQsJ CAcCBhUICQoLAgQWAgMBAh4BAheABQJVzie5FRhoa3A6Ly9rZXlzLmdudXBnLm5ldAAKCRD0 B9sAYdXPQDcIB/9uNkbYEex1rHKz3mr12uxYMwLOOFY9fstP5aoVJQ1nWQVB6m2cfKGdcRe1 2/nFaHSNAzT0NnKz2MjhZVmcrpyd2Gp2QyISCfb1FbT82GMtXFj1wiHmPb3CixYmWGQUUh+I AvUqsevLA+WihgBUyaJq/vuDVM1/K9Un+w+Tz5vpeMidlIsTYhcsMhn0L9wlCjoucljvbDy/ 8C9L2DUdgi3XTa0ORKeflUhdL4gucWoAMrKX2nmPjBMKLgU7WLBc8AtV+84b9OWFML6NEyo4 4cP7cM/07VlJK53pqNg5cHtnWwjHcbpGkQvx6RUx6F1My3y52vM24rNUA3+ligVEgPYBuQEN BFXOJlcBCADAmcVUNTWT6yLWQHvxZ0o47KCP8OcLqD+67T0RCe6d0LP8GsWtrJdeDIQk+T+F xO7DolQPS6iQ6Ak2/lJaPX8L0BkEAiMuLCKFU6Bn3lFOkrQeKp3u05wCSV1iKnhg0UPji9V2 W5eNfy8F4ZQHpeGUGy+liGXlxqkeRVhLyevUqfU0WgNqAJpfhHSGpBgihUupmyUg7lfUPeRM DzAN1pIqoFuxnN+BRHdAecpsLcbR8sQddXmDg9BpSKozO/JyBmaS1RlquI8HERQoe6EynJhd 64aICHDfj61rp+/0jTIcevxIIAzW70IadoS/y3DVIkuhncgDBvGbF3aBtjrJVP+5ABEBAAGJ ASUEGAEIAA8FAlXOJlcCGwwFCRLMAwAACgkQ9AfbAGHVz0CbFwf9F/PXxQR9i4N0iipISYjU sxVdjJOM2TMut+ZZcQ6NSMvhZ0ogQxJ+iEQ5OjnIputKvPVd5U7WRh+4lF1lB/NQGrGZQ1ic alkj6ocscQyFwfib+xIe9w8TG1CVGkII7+TbS5pXHRxZH1niaRpoi/hYtgzkuOPp35jJyqT/ /ELbqQTDAWcqtJhzxKLE/ugcOMK520dJDeb6x2xVES+S5LXby0D4juZlvUj+1fwZu+7Io5+B bkhSVPb/QdOVTpnz7zWNyNw+OONo1aBUKkhq2UIByYXgORPFnbfMY7QWHcjpBVw9MgC4tGeF R4bv+1nAMMxKmb5VvQCExr0eFhJUAHAhVg== Message-ID: Date: Thu, 14 May 2020 11:09:49 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <6a82008b-d272-82f2-a8a1-615437abcda7@virtuozzo.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="GGtcVWxQLTkS3yHs0lf0GT7oRIFcvGVq8" Received-SPF: pass client-ip=207.211.31.81; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 22:25:46 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: Peter Krempa , Juan Quintela , Markus Armbruster , qemu-devel@nongnu.org, "Dr . David Alan Gilbert" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --GGtcVWxQLTkS3yHs0lf0GT7oRIFcvGVq8 Content-Type: multipart/mixed; boundary="FKA4Gc3epMha1WkID1wcWaTBd4buaewK0" --FKA4Gc3epMha1WkID1wcWaTBd4buaewK0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 13.05.20 22:09, Vladimir Sementsov-Ogievskiy wrote: [...] > 1. So, you decided to make only node-mapping, not bitmap-mapping, so we > can't rename bitmaps in-flight and can't migrate bitmaps from one node > to several and visa-versa. I think it's OK, nothing good in such > possibilities, and this simplifies things. On second thought, I wonder whether it would be useful to migrate bitmaps from multiple nodes to a single one. But probably not, this would only make sense for filters, really, and in such a case the bitmaps should probably just be moved prior to migration. (And I can=E2=80=99t imagine any other case. When flattening backing chain= s, the bitmaps from the dropped layers basically become useless.) Max --FKA4Gc3epMha1WkID1wcWaTBd4buaewK0-- --GGtcVWxQLTkS3yHs0lf0GT7oRIFcvGVq8 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl69Ct0ACgkQ9AfbAGHV z0CJpAf+N54IvxXXGFMqzwOiovS+riMMHGPWi0dWDuC2u+V0BxwMymhbZYJHXSY0 PIEuo5xwTX2Otmb9MSsonLDeNxccH7XWOq37CjWSKmqlbr7pZ73+LQcOEAuID7Uz y0HEjWS2x2rshuxUlzXr4PmVrcxMuz6OQZuC1Nf+nYk0L0bRD1ZKUrK7zEMlrSQp UbQp2RNCng2POhCDMIgE45+IO4R42ONWe6XXsnOAOLrRhRVkPiJw/1CrcvBfh9gR 8RgSWVh1rkwCRYURLc1+GlxarecyFfcrE6Ma9oj1LWQcBhnatSCqOFppBl+HrLUb oBWs9SXA2ni2P4BqtUbVk3NrxeRCBA== =lmyB -----END PGP SIGNATURE----- --GGtcVWxQLTkS3yHs0lf0GT7oRIFcvGVq8--