On 10/4/18 1:02 pm, David Gibson wrote: > On Mon, Apr 09, 2018 at 11:55:38AM +0530, Bharata B Rao wrote: >> The new property ibm,dynamic-memory-v2 allows memory to be represented >> in a more compact manner in device tree. > > I still need to look at this in more detail, but to start with: > what's the rationale for this new format? > > It's more compact, but why do we care? The embedded people always > whinge about the size of the deivce tree, but I didn't think that was > really a concern with PAPR.
Well, booting a guest with 500 pci devices (let's say emulated e1000 or virtio-net) creates >20sec delay in the guest while it is fetching the device tree in early setup, property by property, I even have a patch for pseries guest to get FDT as a whole blob from SLOF. It is not The Problem but still annoying. -- Alexey
