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From: Anthony Liguori <aliguori@us.ibm.com>
In-Reply-To: <51ACF872.1080007@redhat.com>
References: <11353237.fLVsHzmD7c@al> <878v2rf5iy.fsf@codemonkey.ws>
	<51ACF872.1080007@redhat.com>
Date: Mon, 03 Jun 2013 15:20:48 -0500
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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: Paolo Bonzini <pbonzini@redhat.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>

Paolo Bonzini <pbonzini@redhat.com> writes:

> 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.

Since I suspect Gleb is done for the day, I will apply directly since
this is a pretty major breakage.

Regards,

Anthony Liguori

>
> Paolo