[Bug 1562653] Re: Ubuntu 15.10: QEMU VM hang if memory >= 1T

[changlimin]

I mean vm hang when memory >= 1100G (1024G when enable ide cdrom)
instead of 1.5G.

If disable hpet, the vm will hang at
acpi_ex_system_memory_space_handler  when memory >= 1100G

If disable kvm, vm is good when memory <= 1020G, but also hang when
memory >= 1024G.

There is no critical information in vm.log:

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Title:
  Ubuntu 15.10: QEMU VM hang if memory >= 1T

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