On Mon, Oct 2, 2017 at 5:59 PM, Linus Lüssing <linus.luessing@xxxxxxxxx> wrote:
> 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: 4a69fcd3a108 ("ARM: meson: Add DTS for Odroid-C1 and Tronfy MXQ boards")
> Signed-off-by: Linus Lüssing <linus.luessing@xxxxxxxxx>
Acked-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
>
> ---
> The following stress-ng command worked fine now:
> $ stress-ng -v --sequential 0 -t 120s --exclude sysfs,opcode --metrics
> (5 hours runtime, tested on an Odroid C1+ with an 4.14-rc1 kernel + SMP
> + USB DTS patches)
> ---
> arch/arm/boot/dts/meson8b.dtsi | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
> index bc278da..d75a5b5 100644
> --- a/arch/arm/boot/dts/meson8b.dtsi
> +++ b/arch/arm/boot/dts/meson8b.dtsi
> @@ -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>;
> --
> 2.1.4
>
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