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Date: Mon, 03 Jun 2013 22:11:30 +0200
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Subject: Re: [Qemu-devel] QEMU aborts since "kvm: support using
 KVM_MEM_READONLY flag for regions"
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To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>, Peter Wu <lekensteyn@gmail.com>, qemu-devel@nongnu.org, Gleb Natapov <gleb@redhat.com>, Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>

Il 03/06/2013 19:49, Anthony Liguori ha scritto:
> Peter Wu <lekensteyn@gmail.com> writes:
> 
>> Hi,
>>
>> With the current git source (f10acc8b38d65a66ffa0588a036489d7fa6a593e),
>> `qemu-system-x86_64 -enable-kvm` fails to run with the following error:
>>
>>     kvm_set_phys_mem: error unregistering overlapping slot: Invalid argument
>>
>> After this message, qemu aborts. Reverting the following commit on top of
>> master makes the bug go away. Removing the `-enable-kvm` option also
>> allows QEMU to operate, but without KVM.
> 
> I also noted this on F19 this weekend.
> 
> Is anyone else seeing this on more recent kernels?

Yes, it's caused by 3.9.  Gleb and I decided to consider this (raising
an error when removing a non-existent slot) a feature since it never
happened as far as we know on released versions of QEMU/nlkt/whatever.
Gleb queued a patch in uq/master, I think he'll be sending a pull
request soon.

Paolo