On Thu, 2017-03-30 at 04:03:49 UTC, Sukadev Bhattiprolu wrote:

quoted

From 3ae8d1ed31b01b92b172fe20e4560cfbfab135ec Mon Sep 17 00:00:00 2001

From: root <redacted>
Date: Mon, 27 Mar 2017 19:43:14 -0400
Subject: [PATCH] powerpc/prom: Increase RMA size to 512MB

When booting very large systems with a large initrd, we run out of
space for either the RTAS or the flattened device tree (FDT). Boot
fails with messages like:

	Could not allocate memory for RTAS
or
	No memory for flatten_device_tree (no room)

Increasing the minimum RMA size to 512MB fixes the problem. This
should not have an impact on smaller LPARs (with 256MB memory),
as the firmware will cap the RMA to the memory assigned to the LPAR.

Fix is based on input/discussions with Michael Ellerman. Thanks to
Praveen K. Pandey for testing on a large system.

Reported-by: Praveen K. Pandey <redacted>
Signed-off-by: Sukadev Bhattiprolu <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/687da8fce1682c9f1e87530e731189

cheers