Commit b9b4bf50 authored Oct 02, 2017 by Linus Lüssing Committed by Kevin Hilman Oct 06, 2017

ARM: dts: meson8b: add reserved memory zone to fix silent freezes

So far, the stress-ng tool for instance quickly resulted in a silent
freeze of the system with no prior notice on a serial console when
running its filesystem or memory stressor classes.

Even with a panic-on-OOM and reboot-on-panic (vm.panic_on_oom=1,
kernel.panic=10) configured, the system would neither reboot nor
would the OOM killer get any chance to otherwise do its job.

The Amlogic reference source code uses a 2MB PHYS_OFFSET. With these 2MB
reserved via DT, stress-ng was able to run on an Odroid C1+ just fine for
several hours, the OOM killer was able to kill processes again and if
configured would successfully trigger a reboot of the system.

Fixes: 4a69fcd3 ("ARM: meson: Add DTS for Odroid-C1 and Tronfy MXQ boards")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

parent bd835d53

arch/arm/boot/dts/meson8b.dtsi

+12 −0

Original line number	Diff line number	Diff line
		@@ -83,6 +83,18 @@
		};
		};

		reserved-memory {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		/* 2 MiB reserved for Hardware ROM Firmware? */
		hwrom@0 {
		reg = <0x0 0x200000>;
		no-map;
		};
		};

		scu@c4300000 {
		compatible = "arm,cortex-a5-scu";
		reg = <0xc4300000 0x100>;