On Sun, Oct 15, 2006 at 14:26:12 -0400,
  Neil Conway <[EMAIL PROTECTED]> wrote:
> At least according to [1], kernel AIO on Linux still doesn't work for
> buffered (i.e. non-O_DIRECT) files. There have been patches available
> for quite some time that implement this, but I'm not sure when they are
> likely to get into the mainline kernel.
> -Neil
> [1] http://lse.sourceforge.net/io/aio.html

An improvement is going into 2.6.19 to handle asynchronous vector reads
and writes. This was covered by Linux Weekly News a couple of weeks ago:

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