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1608 discussions

Very odd mouse issue
by aurfalien 24 May '13

24 May '13

Hi, I'm VNCing into my KVM server and opening virt-manager. When trying to manage a newly created guest, I'm finding the mouse pointer stays on the outside of its virtual machine window. Any insight as to why its tracking so oddly? Thanks in advance, - aurf

1 0

VM Slowness
by compdoc 20 May '13

20 May '13

I hope this in the right list, but I was wondering if someone could help me with a VM I have that has lately started having problems. It had been running for years without problems. It's possible an update is causing this, but I can't say. The VM is running CentOS 5.8 and after a time, the machine begins to slow down. Things like pings or running commands lag. If I reboot the VM, it runs normally for at least a few hours, but it eventually slows again. I've tried changing the VM's virtio devices to standard devices like IDE and e1000, but it makes no difference. Currently its running virtio. Top shows that nothing is taking up significant cpu time, but even running top takes several seconds for it to open. The system is slow now, but top shows: top - 21:39:48 up 1 day, 5:27, 1 user, load average: 0.93, 1.37, 1.12 Tasks: 177 total, 1 running, 176 sleeping, 0 stopped, 0 zombie Cpu(s): 0.3%us, 0.3%sy, 0.0%ni, 98.6%id, 0.9%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2075016k total, 1484624k used, 590392k free, 64336k buffers Swap: 4128760k total, 12k used, 4128748k free, 981368k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4124 root 20 0 2444 1080 812 R 0.1 0.1 0:00.03 top 1 root 15 0 2176 692 604 S 0.0 0.0 0:02.46 init 2 root RT -5 0 0 0 S 0.0 0.0 0:00.39 migration/0 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 Any ideas what to look for? Any information I can provide? Thanks

3 5

add a physical cdrom to kvm
by mattias 06 May '13

06 May '13

how to do it? now by editing the xml

2 2

freebsd as kvm guest
by mattias 30 Apr '13

30 Apr '13

seems not possible to run a freebsd kvm guest on centos 6 all i get in the log using dmesg are something about mmio emulation failed

4 12

ovf conversion
by Markus Falb 19 Apr '13

19 Apr '13

I try do use one of the images available from [1] These images comes in two flavors, one vmx, one ovf. I do not know how to convert one of these to centos6-libvirt-kvm virt-convert gives me an error $ virt-convert -i ovf -o virt-image path_to_image.ovf ERROR Couldn't convert disks: Disk conversion failed with exit status 1: qemu-img: Could not open 'path_to_image.vmdk' The vmdk does exist. It seems that qemu-img can not handle this vmdk format. I am also not sure if v2v could do it. I think the essence of my post is the question Is it possible to use vmx or ovf images with kvm, possibly after converting them? [1] http://info.puppetlabs.com/download-learning-puppet-VM.html -- Kind Regards, Markus Falb

3 3

OpenStack on CentOS
by Karanbir Singh 16 Apr '13

16 Apr '13

Hi, For those that missed this : http://openstack.redhat.com/ targets CentOS directly; Regards -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

1 0

Timer/ISR1 errors have returned in kernel-xen-2.6.18-348.3.1.el5
by David Young 10 Apr '13

10 Apr '13

Hi all, We recently upgrade from CentOS 5.8 to CentOS 5.9 on kernel-xen-2.6.18-348.3.1.el5, and after booting into the new kernel, noted large amounts of these messages every second or so in the logs: Mar 30 21:38:35 atlas2 kernel: Warning Timer ISR/0: Time went backwards: delta=-1393683849 delta_cpu=22316151 shadow=225003685197135 off=129240997 processed=225005208029053 cpu_processed=225003792029053 On both the dom0 and the domUs. Some reading indicates that this _was_ a fault fixed in 2009/2010, but it seems to have resurfaced on the latest kernel. For now, we've reverted back to an earlier kernel. Has anybody else seen this recently, or got any insight? Thanks, David

2 2

Re: [CentOS-virt] [CentOS] qemu-kvm high cpu usage with idle windows guest
by Banyan He 07 Apr '13

07 Apr '13

Maybe you can print out what it is doing, then try to figure out if they are doing good. My linux works good, never tried windows. ------------ Banyan He Blog: http://www.rootong.com Email: banyan(a)rootong.com On 4/7/2013 10:21 PM, Micky wrote: > Windows 2k8 R2 guest with updated virtio drivers is idle inside but on > the host qemu-kvm process uses 7-15% cpu. > > Things that have been tried without any significant success > - removed tablet device > - manually set cpu topology for cores per socket > > Is it just me or the qemu-kvm has little tolerance with windows? > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos >

3 3

Can I have more than 1 bridge attached to a KVM
by Meir Hazon 02 Apr '13

02 Apr '13

Hello Everybody, I have a physical machine with 4 Ethernet cards that I have mapped to 4 bridges. I would like to have each of my KVMs use 2 bridges for NIC bonding. 1. Can I have more than one bridge assign to one KVM? 2. Can I use virt-install to assign a KVM with more than one bridge during the KVM installation? a. It was a long shot but I have tried bridge=br0,br1 ; bridge=br0 bridge=br1 - never worked..... Thanks so much, Meir

2 4

GFS2 hangs after one node going down
by Maurizio Giungato 25 Mar '13

25 Mar '13

Hi guys, my goal is to create a reliable virtualization environment using CentOS 6.4 and KVM, I've three nodes and a clustered GFS2. The enviroment is up and working, but I'm worry for the reliability, if I turn the network interface down on one node to simulate a crash (for example on the node "node6.blade"): 1) GFS2 hangs (processes go in D state) until node6.blade get fenced 2) not only node6.blade get fenced, but also node5.blade! Help me to save my last neurons! Thanks Maurizio

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