Re: direct-IO writes strange behavior

[Andrew Morton <akpm@xxxxxxxx>]

Nathan Scott <nathans@xxxxxxx> wrote:
>
> hi Andrew,
> 
> On Thu, Nov 27, 2003 at 12:44:20AM -0800, Andrew Morton wrote:
> > Alberto Nava <beto@xxxxxxxxxxx> wrote:
> > >
> > > I've done some more digging on this issue. The reason the
> > >  request is going in 4k pages is that the direct-io code is
> > >  giving up in do_direct_IO() and the request is issued as buffer IO :-(.
> > 
> > You seem to be using a -mm kernel.  It has extensive and not-quite-complete
> > and not-really-tested-at-all-with-XFS direct-io changes.
> 
> 
> Alberto's original mail said:
> 
> > I'm seeing a very strange behavior when I write to a file using 512k
> > direct-io writes. The filesystem is XFS and the kernel is 2.6.0-test9.
> 

I know.   But the code which he quoted had -mm stuff in it.