Weblog entry #209 for ajt

KVM Pain in Debian 7.0
Posted by ajt on Sat 15 Jun 2013 at 19:58
Tags: none.

I upgraded my Debian 6.x KVM guests to 7.0 a few days before 7.0 was formally released. All went well and they were happy to run on a Debian KVM 6.x host. A few days after 7.0 had been released and I'd upgraded my desktop boxes I upgraded my home server. The the KVM problems began...

If I start a KVM guest it starts okay and is fine for a while but it is prone to consuming 100% of the host's CPU doing apparently nothing in the guest. Today I ran the guest and tools like rkhunter caused the host's CPU to hit 100%, but when rkhunter finishes the host's CPU still runs flat out. Within the guest the CPU is apparently idle...

In theory I could use cgroups to control this but Debian doesn't support hard limits, only soft ones. I would need to recompile the kernel with the right bits turned on to use hard limits. Apparently it's on in Fedora/Red Hat.

 

Comments on this Entry

Posted by Anonymous (172.50.xx.xx) on Tue 18 Jun 2013 at 17:17
try using proxmox .

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Posted by ajt (89.240.xx.xx) on Tue 18 Jun 2013 at 20:41
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Interesting but not a solution for my problem.

--
"It's Not Magic, It's Work"
Adam

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