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SubjectRe: Interacting with coherent memory on external devices
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.



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