Re: resume= kernel cmdline arg by default on servers

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On 10/18/2018 11:21 AM, Daniel P. Berrangé wrote:
On Thu, Oct 18, 2018 at 05:16:19PM +0200, Björn Persson wrote:
tonynelson@xxxxxxxxxxxxxxxxx wrote:
  Stephen Gallagher said:
  I can't see anyone putting a Server or Atomic Host into hibernation, though. ...
What happens when the "server" is a (K)VM on a desktop/laptop that is hibernated? I know what I'd want to happen.

When I suspend my Fedora laptop (not hibernate because that doesn't
work) with CentOS running in KVM, there is a rather high probability
that the VM will enter an infinite loop when resumed.

That will likely be QEMU trying to inject many hours worth of
interrupts to the guest. In theory it should eventually fix
itself, but it can take a very long time to recover - gets worse
the longer you have been hibernating for too


With centos VMs this is a kernel bug AFAICT that was fixed upstream sometime between 4.18 and 4.19. Though the actual fix hasn't been bisected/identified. Bug was rejected for RHEL though...

https://bugzilla.redhat.com/show_bug.cgi?id=1434566

- Cole
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