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Date: Tue, 16 Mar 2010 10:05:40 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: [Qemu-devel] Re: KVM call agenda for Mar 16
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To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>, qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>, kvm@vger.kernel.org, Juan Quintela <quintela@redhat.com>

On 03/16/2010 05:45 AM, Daniel P. Berrange wrote:
> On Tue, Mar 16, 2010 at 12:38:02PM +0200, Avi Kivity wrote:
>    
>> On 03/16/2010 12:31 PM, Daniel P. Berrange wrote:
>>      
>>>> Polling loops are an indication that something is wrong.
>>>>
>>>>          
>>> Except when people suggest they are the right answer, qcow high
>>> watermark ;-P
>>>
>>>        
>> I liked Anthony's suggestion of an lvm2 block format driver.  No polling.
>>      
> Doesn't that require giving QEMU privileges to perform LVM operations which
> implies QEMU having CAP_SYS_ADMIN  ?
>    

If QEMU is able to resize an LVM partition, it needs to carry privileges.

I'm not sure how this can be done safely in a lesser privileged 
environment.  Presumably, you're over committing storage and there's not 
much you can do if the guests exhaust their storage all at once.

Regards,

Anthony Liguori

> Daniel
>