How much flash space should I reserve for device tree blobs?

Robert Schwebel r.schwebel at
Tue Dec 16 11:19:18 PST 2014

On Mon, Dec 15, 2014 at 03:33:50PM -0500, Brian Hutchinson wrote:
> Reflecting back on the famous quote of "Nobody needs more than 640K",
> how much space should I reserve in flash to 'future proof' my MTD map
> in regards to dtb's?
> Looking at the current flavors of dtb's built in a recent mainline
> kernel, the biggest one I see is 66K.
> How big do you all see these getting?  I know, it's probably a loaded
> question.  Would just like to bounce this off the list as a sanity
> check ... measure twice cut once kind of thing.

With barebox, we put the devicetree into the root filesystem and search
it via an bootspec entry these days.

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