*** This bug is a duplicate of bug 1012946 ***
https://bugs.launchpad.net/bugs/1012946
Still not fixed... I have found a workaround which was working (bellow) but now
its not working anymore...
Same stuff like above in previous posts...
Someone spotted:
Please note that if you want to
*** This bug is a duplicate of bug 1012946 ***
https://bugs.launchpad.net/bugs/1012946
** This bug has been marked a duplicate of bug 1012946
dm-part-sync.patch breaks creating multiple partitions on a LVM volume
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** Also affects: lvm2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1029889
Title:
LVM Based KVM VM taking 100% CPU on first
@Lewdmole,
Looking at your vg and lvdisplay output, it looks like you should have
plenty of space for vm5.
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https://bugs.launchpad.net/bugs/1029889
Title:
LVM Based
@Lewdmole,
Looking at your vg and lvdisplay output, it looks like you should have
plenty of space for vm5.
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https://bugs.launchpad.net/bugs/1029889
Title:
LVM Based
Isn't this duplicate of bug 1012946 ?
Can you please try parted from precise-proposed as per instructions in:
https://bugs.launchpad.net/ubuntu/+source/parted/+bug/1012946/comments/11
and comment here or on the bug 1012946.
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Ok will give it a try and post on bug bug 1012946.
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https://bugs.launchpad.net/bugs/1029889
Title:
LVM Based KVM VM taking 100% CPU on first start and hangs.
To
Sorry for the delay I have tried File based VM works without problems.
I can add another File based VM - I have installed via vmbuilder:
vmbuilder kvm ubuntu \
--suite=precise \
--flavour=virtual \
--arch=amd64 \
--mem=512 \
--hostname=vm4 \
--bridge=br0 \
vgdisplay and lvdisplay
Is there any minimum space required on volume group to create LVM based
VM apart of the LV size of the particular VM ?
** Attachment added: lvdisplay.txt
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1029889/+attachment/3397953/+files/lvdisplay.txt
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** Attachment added: vgdisplay.txt
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1029889/+attachment/3397954/+files/vgdisplay.txt
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Sorry for not responding for so long.
Just to be sure, your symptoms are exactly the same as in the
Description - kvm hangs (no response to network or the vnc console) and
takes 100% cpu?
Yes, the symptoms are exactly the same.
Unfortunately, based on your .xml file it looks like you're not
@Serge,
Let me know what else we could try to diagnose this problem.
This is the same VM machine created via vmbuilder with LVM volumes:
lvcreate -L26G -n vm5 virtualvg
vmbuilder.partition
root 2
swap 6000
boot.sh
# Install openssh-server
apt-get update
apt-get install -qqy --force-yes
VM Builder Logs for VM4 - File Based and VM5 - LVM Based
Partition setup and boot.sh are identical:
vmbuilder.partition
root 2
swap 6000
boot.sh
# Install openssh-server
apt-get update
apt-get install -qqy --force-yes openssh-server
RESULT:
VM4 (File Based) - Works No Problem
VM5 (LVM
** Attachment added: vmbuilder-install-lvm-based-log.txt
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1029889/+attachment/3398046/+files/vmbuilder-install-lvm-based-log.txt
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** Attachment added: lvdisplay-after-vm5-install.txt
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1029889/+attachment/3398048/+files/lvdisplay-after-vm5-install.txt
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** Attachment added: vgdisplay-after-vm5-install.txt
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1029889/+attachment/3398047/+files/vgdisplay-after-vm5-install.txt
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@Lewdmole,
have you had a chance to try this out without lvm?
** Changed in: libvirt (Ubuntu)
Status: New = Incomplete
** Changed in: qemu-kvm (Ubuntu)
Status: New = Incomplete
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@Serge
I have not tried that with non-LVM backend as we generalu use faster LVM
backend.
Will do a test next week after my vacations.
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@Luke,
thanks for the information. Just to be sure, your symptoms are exactly
the same as in the Description - kvm hangs (no response to network or
the vnc console) and takes 100% cpu?
Unfortunately, based on your .xml file it looks like you're not using an
LVM backed VM. I wonder if we
@Lewdmole,
have you seen this happen with non-lvm backed VMs?
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Title:
LVM Based KVM VM taking 100% CPU on first start and
#0 0x7fc1e6d77823 in select () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x7fc1ea661da0 in main_loop_wait (nonblocking=optimized out) at
main-loop.c:456
#2 0x7fc1ea5cb5ff in main_loop () at
/build/buildd/qemu-kvm-1.0+noroms/vl.c:1482
#3 main (argc=optimized out, argv=optimized out,
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WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
virsh edit lb1
or other application using the libvirt API.
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domain type='kvm'
namelb1/name
I've attached the VM instance's definition and the debugging output from
gdb (which seemed quite minimal). Let me know if you need me to install
debugging symbols for libc as well, or if you need any other data.
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I have experienced the same issue with 1 of 3 identical machines. All
Intel Xeon E31230 @ 3.20GHz. Let me know if there is anything I can do
to help diagnose it.
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Hi,
I still suffer from the issue described above even after various kernel and
libvirt updates
which were issued by ubuntu.
Serge Hallyn tried to repeat this issue but without success.
Please try the procedures I was trying and post the logs and debug information
here along with
your VM setup
Please follow the instructions in the section Debug Symbol Packages on
https://wiki.ubuntu.com/DebuggingProgramCrash to install qemu-kvm-
dbgsym. Restart one of the machine which hangs taking 100% cpu, then
from another terminal do
gdb -p $(pidof kvm) # or insert the pid of the hanging kvm
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