Re: [PATCH v2 5/5] dax: handle media errors in dax_do_io

[hch@xxxxxxxxxxxxx]

On Mon, Apr 25, 2016 at 11:32:08AM -0400, Jeff Moyer wrote:
> > EINVAL is a concern here.  Not due to the right error reported, but
> > because it means your current scheme is fundamentally broken - we
> > need to support I/O at any alignment for DAX I/O, and not fail due to
> > alignbment concernes for a highly specific degraded case.
> >
> > I think this whole series need to go back to the drawing board as I
> > don't think it can actually rely on using direct I/O as the EIO
> > fallback.
> 
> The only callers of dax_do_io are direct_IO methods.

They are because the DAX I/O pass is a mess, but that doesn't mean
the user specific O_DIRECT on the open nessecarily.