Re: Suspend-resume failure on Intel Eagle Lake Core2Duo
From: Marc Zyngier
Date: Thu Aug 03 2017 - 04:42:03 EST
On 03/08/17 08:32, Masahiro Yamada wrote:
> 2017-08-01 0:55 GMT+09:00 Thomas Gleixner <tglx@xxxxxxxxxxxxx>:
>> On Mon, 31 Jul 2017, Tomi Sarvela wrote:
>>> On 31/07/17 18:06, Thomas Gleixner wrote:
>>>> Can you please remove the patch. And try the following:
>>>> # echo N > /sys/module/printk/parameters/console_suspend
>>>> # echo mem > /sys/power/state
>>>> and log the output of the serial console. That way we might get a clue
>>>> where it gets stuck.
>>> I'm afraid it hangs right away. No response from SSH, no output to serial.
>> What means hangs right away? Is there no output at all on the serial
>> console? Or does it just stop at some point?
> Sorry for jumping in.
> Finally, I found this thread.
> My environment is completely different (ARM64 board),
> I am also suffering from a hibernation problem
> since this commit.
> I get no response on the serial console
> after "Restarting tasks ... done." log message.
> By reverting bf22ff45bed6 ("genirq: Avoid unnecessary low level
> irq function calls", I can get hibernation working again.
> SW info:
> defconfig: arch/arm64/configs/defconfig
> DT : arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts
> PSCI : ARM Trusted Firmware
> SoC info:
> CPU : Cortex-A72 * 2 + Cortex-A53 * 2
> irqchip : GICv3 (drivers/irq/irq-gic-v3.c)
Let me take an educated guess: It feels like your firmware doesn't
save/restore the GIC context across suspend/resume. Is that something
you could check, assuming you have access to the firmware source code?
Jazz is not dead. It just smells funny...