PMFS and driver model backing devices / device nodes

Matthew Wilcox willy at
Tue Nov 12 08:18:08 EST 2013

On Mon, Nov 11, 2013 at 02:42:50PM -0800, Andy Lutomirski wrote:
> Do you know if anyone has given any thought to what a backing device
> should look like?  ISTM that passing a physaddr as a mount option is
> messy and that it would be much nicer if you could mount some kind of
> device node.  As an added benefit, this would let things like
> populating the image on startup be done separately from the underlying
> filesystem.
> XIP block devices are somewhat close to being the right thing.

Yes, that's exactly the plan :-)

See, for example, this thread:

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