From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37223) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YBVuh-0004zb-0y for qemu-devel@nongnu.org; Wed, 14 Jan 2015 16:55:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YBVuc-0004dl-0m for qemu-devel@nongnu.org; Wed, 14 Jan 2015 16:55:42 -0500 Received: from indium.canonical.com ([91.189.90.7]:38407) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YBVub-0004cq-Pu for qemu-devel@nongnu.org; Wed, 14 Jan 2015 16:55:37 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.76 #1 (Debian)) id 1YBVua-0003rt-S9 for ; Wed, 14 Jan 2015 21:55:36 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id D1FE02E80AE for ; Wed, 14 Jan 2015 21:55:36 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Wed, 14 Jan 2015 21:49:22 -0000 From: Serge Hallyn <1410288@bugs.launchpad.net> Sender: bounces@canonical.com References: <20150113143936.23767.65354.malonedeb@gac.canonical.com> <20150113164029.5063.34589.malone@chaenomeles.canonical.com> Message-Id: <20150114214922.GE17400@ubuntumail> Errors-To: bounces@canonical.com Subject: Re: [Qemu-devel] [Bug 1410288] Re: qemu-img conversion to qcow2 hangs with blank image less than 100kiB Reply-To: Bug 1410288 <1410288@bugs.launchpad.net> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Does it also fail with the qemu from https://launchpad.net/~ubuntu-virt/+archive/ubuntu/virt-daily-upstream ? (This isn't quite git head, but it is qemu v2.2) -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1410288 Title: qemu-img conversion to qcow2 hangs with blank image less than 100kiB Status in QEMU: New Status in qemu package in Ubuntu: Confirmed Bug description: If you try to convert a blank image to qcow2 that is less than 100kiB in size then qemu-img hangs trying to seek to the end of the file. $ truncate --size 102399 /tmp/temp $ qemu-img convert -p -O qcow2 /tmp/temp /tmp/temp2.qcow2 I'm finding this on all versions of qemu-img v2. strace shows a seek loop. ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) =3D 0 _llseek(6, 0, [100000], SEEK_END) =3D 0 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: qemu-utils 2.0.0+dfsg-2ubuntu1.10 ProcVersionSignature: User Name 3.13.0-43.72-generic 3.13.11.11 Uname: Linux 3.13.0-43-generic i686 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: i386 Date: Tue Jan 13 14:30:39 2015 SourcePackage: qemu UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1410288/+subscriptions