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

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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: 4a69fcd3a1 ("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>
This commit is contained in:
Linus Lüssing 2017-10-02 17:59:03 +02:00 committed by Kevin Hilman
parent bd835d53f5
commit b9b4bf504c
1 changed files with 12 additions and 0 deletions
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12
arch/arm/boot/dts/meson8b.dtsi
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@ -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>;