Re: [Qemu-devel] Kernel Panic on Yum update

[Gerhard Wiesinger]

On 15.05.2015 08:51, Paolo Bonzini wrote:
> On 15/05/2015 08:34, Gerhard Wiesinger wrote:
> > Helllo,
> >
> > I'm using latest qemu-kvm-2.3.0-3.fc21.x86_64 from libvirt repository
> > (updated afterwards). Running yum regularly crashes the VM like below.
> > VM is stripped down to minimum memory requirements (256MB) for owncloud.
> > See below.
> >
> > Looks like a problem in virtio-net or a kernel bug with low memory
> > situations.
> You're simply running out of memory.  Yum can be a memory hog.

Yes, yum takes memory. But there is ~2.2 GB virt memory available. That 
should be enough. Therefore I think it is a kernel problem. As in 
previous crashes on the mailing list there is a lot of swap available 
(2GB) which isn't touched in ANY way.

Under normal conditions without yum:
free
              total        used        free      shared buff/cache   
available
Mem:         243036      132540       12716       15520 97780       74964
Swap:       2064380           0     2064380

And running it after reboot works fine (with all the services up).

Ciao,
Gerhard