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Fri, 4 Oct 2019 13:37:53 +0000 (UTC) Received: from dresden.str.redhat.com (ovpn-204-31.brq.redhat.com [10.40.204.31]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E5D2710013A7; Fri, 4 Oct 2019 13:37:45 +0000 (UTC) Subject: Re: [PATCH v15 4/5] block: introduce backup-top filter driver To: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org References: <20191001131409.14202-1-vsementsov@virtuozzo.com> <20191001131409.14202-5-vsementsov@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: Fri, 4 Oct 2019 15:37:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <20191001131409.14202-5-vsementsov@virtuozzo.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="NvHchDsnGsotr1dT1KGlWe2p24pvjZBiS" X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 04 Oct 2019 13:37:56 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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: kwolf@redhat.com, wencongyang2@huawei.com, xiechanglong.d@gmail.com, qemu-devel@nongnu.org, armbru@redhat.com, den@openvz.org, jsnow@redhat.com 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) --NvHchDsnGsotr1dT1KGlWe2p24pvjZBiS Content-Type: multipart/mixed; boundary="M5ugk0nf1C3B0ANslryi9OFV6PXzAuE4S" --M5ugk0nf1C3B0ANslryi9OFV6PXzAuE4S Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 01.10.19 15:14, Vladimir Sementsov-Ogievskiy wrote: > Backup-top filter caches write operations and does copy-before-write > operations. >=20 > The driver will be used in backup instead of write-notifiers. >=20 > Signed-off-by: Vladimir Sementsov-Ogievskiy > --- > block/backup-top.h | 41 +++++++ > block/backup-top.c | 281 ++++++++++++++++++++++++++++++++++++++++++++= > block/Makefile.objs | 1 + > 3 files changed, 323 insertions(+) > create mode 100644 block/backup-top.h > create mode 100644 block/backup-top.c Reviewed-by: Max Reitz --M5ugk0nf1C3B0ANslryi9OFV6PXzAuE4S-- --NvHchDsnGsotr1dT1KGlWe2p24pvjZBiS Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl2XSygACgkQ9AfbAGHV z0Cq8wf/fR7iukfz7K5yQgXMF/BhfoiaOHJ1Gr7JBpKuoCNW8pHD1QYETXFIHAl+ RKGaM5CoDsIm7bZCOXg5i+vVkQxAmPyeBGax802i3d2hdqk/8H6aB+R+O5bj64dc n/7Bbj8opt3l8QVtgDdu/S6la5sQn8CJklvrzB6y/Cwzrktw2i5kpCD01NcgBN+Y IYo3DY+uFLUufyF2RMKeSrN1yNy7d+6+z/mkzY96d3IbCbZN7d0QYP9Eqg29UQrz MuDrU+/bCM0rLdFgqdlFcNROc1ZbkqMidKaCpibdn0UGdQ8wu4txmnXsMx5V2IZB HhtoVPmsXfRFfSXPHr7nemxhHf0pdQ== =0Ngf -----END PGP SIGNATURE----- --NvHchDsnGsotr1dT1KGlWe2p24pvjZBiS--