Public bug reported:

------- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT-------
Hi, in some environments it was observed that this qemu patch to enable THP 
made it more likely to hit guest migration issues, however the following kernel 
patch resolves those migration issues:

https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next&id=c066fafc595eef5ae3c83ae3a8305956b8c3ef15
KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix()

Once merged upstream, it would be good to include that change as well to
avoid potential migration problems. Should I open a new bug for that or
is it better to track here?

Note Paelzer: I have not seen related migration issues myself, but it
seems reasonable and confirmed by IBM.

** Affects: qemu (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1788098

Title:
  Avoid migration issues with aligned 2MB THB

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