[libvirt] PATCH: Disable QEMU drive caching

[Anthony Liguori]

Chris Wright wrote:
> * Anthony Liguori (anthony at codemonkey.ws) wrote:
>   
>> Mark McLoughlin wrote:
>>     
>>> This is the bit I really don't buy - we're equating qemu caching to IDE
>>> write-back caching and saying the risk of corruption is the same in both
>>> cases.
>>>       
>> Yes.
>>     
>
> I'm with Mark here.
>   

I've been persuaded.  Relying on the host's integrity for guest data 
integrity is not a good idea by default.  I don't think we should use 
cache=off to address this though.  I've sent a patch and started a 
thread on qemu-devel.  Let's continue the conversation there.

Regards,

Anthony Liguori