[Qemu-devel] Re: [PATCH][RFC] Refactor AIO to allow multiple AIO implementations

[Gerd Hoffmann <kraxel@redhat.com>]

Anthony Liguori wrote:
> Gerd Hoffmann wrote:
>> Hmm, what is the long-term plan for this?
> 
> Step one is to move the generic aio bits out of block-raw-posix (which
> this patch does).
> 
> Step two is to move the posix-aio routines out of block-raw-posix.
> 
> Step three would be to add a generic interface to allow block-raw-posix
> to use multiple aio implementations
> 
> Step four would be to add a new aio implementation

Sounds good.

> (I think the best
> route is a thread-pool based implementation).

Not sure about that.  linux-aio would have the advantage that the kernel
knows about all the requests in flight and probably can do a better job
on I/O ordering and scheduling then.  But once we can have multiple
different implementations we can just try ;)

cheers,
  Gerd