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Subject: Re: [virtio-dev] [PATCH RESEND] virtio-pmem: PMEM device spec

On Wed, Aug 04, 2021 at 01:28:39PM +0200, Pankaj Gupta wrote:
> > > +\subsection{Device Initialization}\label{sec:Device Types / PMEM Device / Device Initialization}
> > > +
> > > +Device hotplugs physical memory to guest address space. Persistent memory device
> > > +is emulated with file backed memory at host side.
> >
> > This paragraph can be dropped. The device could be implemented in a
> > number of ways and it's beyond the scope of the specification.
> But spec is for current implementation?  As we have more devices or ways, we
> can amend this.

The spec defines the driver/device interface, not the implementation. By
focussing on the interface rather than implementation, we leave room for
multiple implementations and avoid baking in assumptions about one
particular implementation (e.g. file-backed MAP_SHARED host memory).


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