[Bug 1297218] Re: guest hangs after live migration due to tsc jump

[Serge Hallyn]

A few notes after a few weeks of playing with this.

I've not reproduced the failure with migration per se.

However, when I did not add 'aio=native' to the backing store flags
(i.e. file=/mnt/disk.img,if=virtio,cache=none,aio=native), after around
2 days qemu would exit saying

 (qemu) qemu: qemu_thread_create: Resource temporarily unavailable

This appears to me to be a bug in the underlying gluster mount.

Until it is verified that this can be reproduced with another shared
backing store and is not simply a result of bad behavior of the
underlying glusterfs, priority of this bug will be lowered.

** Changed in: libvirt (Ubuntu)
   Importance: High => Medium

** Changed in: libvirt (Ubuntu)
     Assignee: Serge Hallyn (serge-hallyn) => (unassigned)

** Changed in: libvirt (Ubuntu)
   Importance: Medium => Low

** Also affects: glusterfs (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1297218

Title:
  guest hangs after live migration due to tsc jump

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