From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Subject: Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink DNS-327L Date: Mon, 20 Apr 2015 18:15:46 +0300 Message-ID: References: <552A6209.9040903@gmail.com> <20150412145857.GA14038@lunn.ch> <20150412194735.GA27921@lunn.ch> <552BCFAA.2020109@free-electrons.com> <1ec8906f00468ca5a9fa227f8c83fe69@mail.ncrmnt.org> <55351569.7000307@free-electrons.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <55351569.7000307@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org To: Gregory CLEMENT Cc: Andrew Lunn , Sebastian Hesselbarth , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , Linus Walleij , Wolfram Sang , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Jason Cooper List-Id: devicetree@vger.kernel.org Gregory CLEMENT =D0=BF=D0=B8=D1=81=D0=B0=D0=BB 20.04.2015 18:04: > Hi Andrew, >=20 > On 13/04/2015 16:32, Andrew wrote: >> Gregory CLEMENT =D0=BF=D0=B8=D1=81=D0=B0=D0=BB 13.04.2015 17:16: >>> Hi Andrew(s), >>>=20 >>> 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. >>>>>>=20 >>>>>> Hi Andrew >>>>>>=20 >>>>>> 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. >>>>>>=20 >>>>>> Thanks >>>>>> Andrew >>>>>=20 >>>>>=20 >>>>> arch/arm/configs/mvebu_v7_defconfig has >>>>> CONFIG_ARM_MVEBU_V7_CPUIDLE=3Dy, >>>>> 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=20 >>>>> boxes >>>>> I >>>>> own. >>>>>=20 >>>>> All I have to do to trigger the bug - enable cpuidle driver and l= et >>>>> the box >>>>> sit for some 4-12 hours, till it hard-freezes. If wdt is enabled = - >>>>> wdt reboot >>>>> will happen. >>>>=20 >>>> That simple! Well i've got a 370RD which has been sat mostly idle=20 >>>> for >>>> weeks, using the mvebu_v7_defconfig, with a few addition things=20 >>>> turned >>>> on for testing the Ethernet switch on the board. I've not had that >>>> lockup. >>>>=20 >>>> One thing you can try to narrow it down is the disable the second=20 >>>> idle >>>> mode. Take a look at armada370_idle_driver. Keep the >>>> ARM_CPUIDLE_WFI_STATE but disable the "Deep Idle" state. >>>=20 >>> Actually you don't have to modify the kernel you can setup the CPU=20 >>> idle >>> level >>> you want at runtime: >>>=20 >>> echo 1 > /sys/devices/system/cpu/cpu0/cpuidle/state1/disable >>>=20 >>> will disable the state1. By doing this on Armada 370 then you >>> will only use the WFI state. >>>=20 >>> Do you still have this issue on v4.0-rc7? >>=20 >> Yep, I can confirm having this issue on 4.0-rc7. I will only be able= =20 >> to >> test if >> disabling state1 fixes it the next weekend. >=20 > Did you manage to do some test this week-end? >=20 > Thanks, >=20 > Gregory >=20 >=20 >>=20 >>>=20 >>> Thanks, >>>=20 >>> Gregory >>>=20 >>>=20 >>>=20 >>>>=20 >>>> Andrew >>>>=20 >>=20 Sorry, I've been away for the weekend but managed to take the hardware home on my way back. I'll rig it for a long test today in the evening. Expect some test results somewhere around Wednesday. (Guess it doesn't count unless it's stable for 24+ hours). --=20 Regards, Andrew