From: Serge Hallyn <1410288@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [Bug 1410288] Re: qemu-img conversion to qcow2 hangs with blank image less than 100kiB
Date: Wed, 14 Jan 2015 21:49:22 -0000 [thread overview]
Message-ID: <20150114214922.GE17400@ubuntumail> (raw)
In-Reply-To: 20150113164029.5063.34589.malone@chaenomeles.canonical.com
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) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 0
ioctl(6, FS_IOC_FIEMAP, 0xb5e68dc4) = 0
_llseek(6, 0, [100000], SEEK_END) = 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
next prev parent reply other threads:[~2015-01-14 21:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20150113143936.23767.65354.malonedeb@gac.canonical.com>
2015-01-14 7:29 ` [Qemu-devel] [Bug 1410288] Re: qemu-img conversion to qcow2 hangs with blank image less than 100kiB Neil Wilson
[not found] ` <20150113164029.5063.34589.malone@chaenomeles.canonical.com>
2015-01-14 21:49 ` Serge Hallyn [this message]
2015-01-14 21:55 ` Serge Hallyn
2016-01-12 22:31 ` pranith
2016-11-07 11:30 ` Robie Basak
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150114214922.GE17400@ubuntumail \
--to=1410288@bugs.launchpad.net \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).