On 01/27/11 02:55, Avi Kivity wrote:
> On 01/26/2011 06:51 PM, Asdo wrote:
>> Some time ago in this list it was mentioned that old kernels pre-2.6.28
>> don't work well with KVM.
>> (in particular we have a machine with 2.6.24)
>>
> 
> pre 2.6.27 kernels don't have mmu notifiers and thus don't handle
> overcommit well.  No idea if there's anything wrong with 2.6.27 itself.

The KVM code in the 2.6.27 kernel is broken. qemu-kvm emits:

KVM kernel module broken (DESTROY_MEMORY_REGION).
Please upgrade to at least kernel 2.6.29 or recent kvm-kmod
(see http://sourceforge.net/projects/kvm).

You'll need to use newer kvm-kmod versions.

David
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