On Mon, Oct 24, 2016 at 09:24:04PM +1100, Michael Ellerman wrote:

The code already looks for "linux,usable-memory" in preference to 
"reg". Can you use that instead?

Yes, we could set the size of "linux,usable-memory" to zero instead of 
setting status to "disabled".

I'll send a v5 of this set which drops 1/5 and 2/5. That would be the 
only difference here.

That would have the advantage that existing kernels already understand
it.

Another problem with using "status" is we could have device trees out
there that have status = disabled and we don't know about it, and by
changing the kernel to use that property we break people's systems.
Though for memory nodes my guess is that's not true, but you never know ...

-- 
Reza Arbab