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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1603902
Title:
qemu-img convert hangs on Ubuntu Server 16.04 with 100% cpu
Status in linux package in Ubuntu:
Incomplete
Status in qemu-kvm package in Ubuntu:
New
Bug description:
When i try to convert raw image to qcow2 format with command:
qemu-img convert -O qcow2 base-image.img base-image.qcow2
i have several problems:
1. qemu-img process never stops by itself and i can not kill it with kill
-9
2. qemu-img process utilizes 100% of one cpu core
Additional information:
1. I use supermicro server with 28 cpu cores and host Ubuntu Server 16.04
2. Filesystem is ext4
3. Original VM raw image (with installed guest Ubuntu Server 16.04) works
without any problem. When i am trying to convert formats this VM is powered off.
4. uname -r
4.4.0-28-generic
dpkg -s qemu-kvm | grep Version
Version: 1:2.5+dfsg-5ubuntu10.2
dpkg -s qemu-utils | grep Version
Version: 1:2.5+dfsg-5ubuntu10.2
strace qemu-img convert -O qcow2 base-image.img base-image.qcow2
...
lseek(10, 1361051648, SEEK_DATA) = 1386217472
lseek(10, 1386217472, SEEK_DATA) = 1386217472
lseek(10, 1386217472, SEEK_HOLE) = 1403359232
lseek(10, 1403359232, SEEK_DATA) = 1403387904
lseek(10, 1403387904, SEEK_DATA) = 1403387904
lseek(10, 1403387904, SEEK_HOLE) = 1419091968
lseek(10, 1419091968, SEEK_DATA
What can cause such strange behavior, and how can i convert raw image
to qcow2 format?
UPDATED: I have installed 4.6.0 linux kernel, and everything works
fine right now. But the question still exists: is there any other way
to fix this bug for qemu-img and Ubuntu 16.04?
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