Re: [Qemu-devel] Re: [PATCH 2/3] Move aio implementation out of raw block driver

[Gerd Hoffmann]

Anthony Liguori wrote:
> Gerd Hoffmann wrote:
>> How about providing a aio interface implementation which simply uses
>> read/write syscalls (thereby not being really async obviously)?  Then
>> use that as fallback instead of aio emulation?  And also drop CONFIG_AIO
>> then?
> 
> Yeah, this is basically what block-raw-posix does today.  I was thinking
> the same thing.  I was also thinking that you could do an aio
> implementation for win32 and possibly reunify block-raw-posix and
> block-raw-linux.

Sure, that the next logical steps.  Later we can also convert all
block-* drivers to the new aio interface and subsequently drop alot of
dead block layer code.

> But before going down this route, I want to see if linux-aio is really
> the right tool for the job.

IMHO this all makes sense even in case linux-aio turns out to not be
worth it.

cheers,
  Gerd