Re: [Qemu-devel] [patch] non-blocking disk IO

[Henrik Nordstrom]

On Mon, 3 Oct 2005, Troy Benjegerdes wrote:

> Why is there a posix async IO 'standard', but a different linux AIO standard?

Because the Posix AIO sucks quite badly both to implement and use.

But all Linuxes I know of have a Posix AIO library. Some even have a Posix 
AIO library using Linux AIO.

> Having something that wraps both Linux-native AIO and posix async I/O
> might make supporting it a little easier to swallow on cross-platform
> applications.

If you anyway plan on having Posix AIO support then go for the Posix AIO 
interface. The performance reasons why Linux AIO exists is very unlikely 
to be an issue to qemu as you need to be quite I/O intensive to see any 
performance difference.

Regards
Henrik