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Thu, 10 Oct 2019 15:17:54 +0000 (UTC) To: Qemu-block From: Max Reitz Subject: Problems with c8bb23cbdbe3 on ppc64le 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: <2e7d321c-89f4-f3fd-8331-6bc276880de2@redhat.com> Date: Thu, 10 Oct 2019 17:17:52 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nEHW2NIlU9mP0nK8UjLb2z1Utf0Y5qaVm" X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.40]); Thu, 10 Oct 2019 15:17:56 +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: Alberto Garcia , Anton Nefedov , Vladimir Sementsov-Ogievskiy , "qemu-devel@nongnu.org" 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) --nEHW2NIlU9mP0nK8UjLb2z1Utf0Y5qaVm Content-Type: multipart/mixed; boundary="rFZG88Z6MmuBWtanGqO5QVdFSg2isR1tP" --rFZG88Z6MmuBWtanGqO5QVdFSg2isR1tP Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hi everyone, (CCs just based on tags in the commit in question) I have two bug reports which claim problems of qcow2 on XFS on ppc64le machines since qemu 4.1.0. One of those is about bad performance (sorry, is isn=E2=80=99t public :-/), the other about data corruption (https://bugzilla.redhat.com/show_bug.cgi?id=3D1751934). It looks like in both cases reverting c8bb23cbdbe3 solves the problem (which optimized COW of unallocated areas). I think I=E2=80=99ve looked at every angle but can=E2=80=98t find what co= uld be wrong with it. Do any of you have any idea? :-/ Thanks, Max --rFZG88Z6MmuBWtanGqO5QVdFSg2isR1tP-- --nEHW2NIlU9mP0nK8UjLb2z1Utf0Y5qaVm Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl2fS6AACgkQ9AfbAGHV z0A/JAgAomnur4cuPk08qARDpG/eZv78UC3CQljfS2dEbMLJWt7rcuHwrovRjvfY RXVObK6f8ndBKrO8VkcTqvSGQR6nx3mRjFZF8rTlm91HhrE0u+sUMlCYa3YwbMgB xj930YmLlQ5/f78fiG96xoJeN8cAl7kbTHUpMwQwH8ETY+vEv+c5aRz32KTBAwjn XnXzoE3bTN+C+0piWNjgEY5BcrRje/SaVbDrRwRU5gpJCd6516As4e1osiU7eRrS J1Wx1viwpEV0wGZ3N9Iy2Z1hpSM0v7YykSp4PxHTYMczj+TDzVIAAvwCbtlf8/ql 3FzkP3SdLGYS+BRi9QeYmBQbIV1EKA== =H3ID -----END PGP SIGNATURE----- --nEHW2NIlU9mP0nK8UjLb2z1Utf0Y5qaVm--