Re: Interacting with coherent memory on external devices

From: Paul E. McKenney
Date: Fri Apr 24 2015 - 10:57:49 EST

On Fri, Apr 24, 2015 at 09:12:07AM -0500, Christoph Lameter wrote:
> On Thu, 23 Apr 2015, Paul E. McKenney wrote:
> >
> > DAX
> >
> > DAX is a mechanism for providing direct-memory access to
> > high-speed non-volatile (AKA "persistent") memory. Good
> > introductions to DAX may be found in the following LWN
> > articles:
> 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.

Thanx, Paul

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