Re: [PATCH v4 2/4] generic: test mmap io fom DAX to non-DAX

Xiong Zhou
2017-04-18T14:49:57Z

On Tue, Apr 18, 2017 at 03:12:26AM -0700, Christoph Hellwig wrote:
> On Mon, Apr 17, 2017 at 03:14:13PM +0800, Xiong Zhou wrote:
> > Mount TEST_DEV as non-DAX, SCRATCH_DEV as DAX, then
> > do mmap DIO from DAX to non-DAX.
> >
> > This test is split from generic/413. Since DIO from DAX
> > to non-DAX is only supported/doable when device underneath
> > has memory(struct page) backend.
> >
> > By ndctl looking at SCRATCH_DEV, skip this test if it is
> > not in "memory mode".
>
> DAX devices don't need to be something using NFIT, so I don't think this
> method is correct.

Ya. This commit message needs update. I'm trying another method, not being
that nvdimm specific.