Re: Problems KVM-84

[Avi Kivity <avi@redhat.com>]

J- MAN wrote:
>
> > I don't think this is a regression from kvm-83. Large qcow2 files have 
> > lots of metadata which needs to be loaded up front. If the kernel 
> > doesn't have this cached, it will take a long time.
>
> I'm just wondering what happend between 83 and 84, because there is no 
> startup delay in 83.
> My real problem is that libvirt times out when waiting for my virtual 
> machine to start using 84, unless i manually start the machine first 
> to get it cached.
>
> This makes using libvirt & virt-manager useless with 84 unless i 
> pre-start all my VMs manually to get them cached.
>
> I'm suprised nobody else is having this issue.  If there is anything 
> else i can do to help please let me know.


Try (with kvm-83):

  echo 255 > /proc/sys/vm/drop-caches
  qemu ...

-- 
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