Re: Interacting with coherent memory on external devices

[Christoph Lameter]

On Fri, 24 Apr 2015, Paul E. McKenney wrote:

> > DAX is a mechanism to access memory not managed by the kernel and is the
> > successor to XIP. It just happens to be needed for persistent memory.
> > Fundamentally any driver can provide an MMAPPed interface to allow access
> > to a devices memory.
>
> I will take another look, but others in this thread have called out
> difficulties with DAX's filesystem nature.

Right so you do not need the filesystem structure. Just simply writing a
device driver that mmaps data as needed from the coprocessor will also do
the trick.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/