Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink DNS-327L

[Andrew]

Gregory CLEMENT ÐÐÑÐÐ 13.04.2015 17:16:
> Hi Andrew(s),
>
> On 12/04/2015 21:47, Andrew Lunn wrote:
> > On Sun, Apr 12, 2015 at 06:41:31PM +0300, Andrew wrote:
> > > Andrew Lunn ?????????? 12.04.2015 17:58:
> > > > > Okay, got it.
> > > > > I'll file a bug about this issue to the the bugzilla. However
> > > > > something
> > > > > tells me it might not be cpuidle, but D-link. This one's sounds 
> > > > > nasty
> > > > > and it has been around since 3.16.x. How could it go unnoticed?
> > > > > Unfortunately I have no other armada-370 hardware to test it.
> > > >
> > > > Hi Andrew
> > > >
> > > > A few of us here do have hardware to test with. Please give a 
> > > > detailed
> > > > description of how you reproduce the issue, and your kernel
> > > > configuration, if different from mvebu_v7_defconfig, or
> > > > multi_v7_defconfig.
> > > >
> > > > 	Thanks
> > > > 		Andrew
> > >
> > >
> > > arch/arm/configs/mvebu_v7_defconfig has 
> > > CONFIG_ARM_MVEBU_V7_CPUIDLE=y,
> > > so it should be sufficient to reproduce the issue. I first 
> > > encountered
> > > this issue using that very config and observed it on 2 DNS-327L boxes 
> > > I
> > > own.
> > >
> > > All I have to do to trigger the bug - enable cpuidle driver and let
> > > the box
> > > sit for some 4-12 hours, till it hard-freezes. If wdt is enabled -
> > > wdt reboot
> > > will happen.
> >
> > That simple! Well i've got a 370RD which has been sat mostly idle for
> > weeks, using the mvebu_v7_defconfig, with a few addition things turned
> > on for testing the Ethernet switch on the board. I've not had that
> > lockup.
> >
> > One thing you can try to narrow it down is the disable the second idle
> > mode. Take a look at armada370_idle_driver. Keep the
> > ARM_CPUIDLE_WFI_STATE but disable the "Deep Idle" state.
>
> Actually you don't have to modify the kernel you can setup the CPU idle 
> level
> you want at runtime:
>
> echo 1 > /sys/devices/system/cpu/cpu0/cpuidle/state1/disable
>
> will disable the state1. By doing this on Armada 370 then you
> will only use the WFI state.
>
> Do you still have this issue on v4.0-rc7?

Yep, I can confirm having this issue on 4.0-rc7. I will only be able to 
test if
disabling state1 fixes it the next weekend.

> Thanks,
>
> Gregory
>
>
>
> >       Andrew

--
Regards,
Andrew
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/