Re: [Qemu-devel] Re: [RFC] Disk integrity in QEMU

[Avi Kivity]

Ryan Harper wrote:
>> From seeing kvm write data that is greater than that of bare metal,
>> I would think that your test dataset is too small and not
>> exceeding that of the host cache size.
>>     
>
> The size was chosen so it would fit in to demonstrate the crazy #'s seen
> on cached writes without O_DSYNC.
>
>   

A disk that is smaller than host memory is hardly interesting.  Give the
memory to the guest and performance will jump to memory speed rather
than disk speed.



-- 
Do not meddle in the internals of kernels, for they are subtle and quick to 
panic.