Re: [kvm-devel] [Qemu-devel] Re: [PATCH 1/3] Refactor AIO interface to allow other AIO implementations

[Avi Kivity]

Anthony Liguori wrote:
> Right now, not specifying the -aio option is equivalent to your proposed 
> -aio auto.
>
> I guess I should include an info aio to let the user know what type of 
> aio they are using.  We can add selection criteria later but 
> semantically, not specifying an explicit -aio option allows QEMU to 
> choose whichever one it thinks is best.
>
>   
For the majority of deployments posix aio should be sufficient.  The few 
that need something else can use Linux aio.

Of course, a managed environment can use Linux aio unconditionally if 
knows the kernel has all the needed goodies.

--
Any sufficiently difficult bug is indistinguishable from a feature.