Re: Interacting with coherent memory on external devices
From: Jerome Glisse
Date: Fri Apr 24 2015 - 11:09:43 EST
On Fri, Apr 24, 2015 at 07:57:38AM -0700, Paul E. McKenney wrote:
> 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.
Do not waste your time on that this is not what we want. Christoph here
is more than stuborn and fails to see the world.
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