From mboxrd@z Thu Jan  1 00:00:00 1970
From: alex.shi@linaro.org (Alex Shi)
Date: Thu, 22 May 2014 16:59:45 +0800
Subject: RCU stall on panda
In-Reply-To: <537614AF.50100@ti.com>
References: <53675C5F.10509@linaro.org>
 <20140505180617.GM8754@linux.vnet.ibm.com>
 <20140512212102.GF5668@atomide.com> <5371BD69.8010600@linaro.org>
 <20140513153220.GC16837@atomide.com> <53747E6D.60500@linaro.org>
 <53748371.5030704@linaro.org> <5374C07C.1070400@linaro.org>
 <20140515183247.GF23659@atomide.com> <5375091D.3010607@ti.com>
 <5375C145.6070904@linaro.org> <537614AF.50100@ti.com>
Message-ID: <537DBC81.2090809@linaro.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 05/16/2014 09:37 PM, Santosh Shilimkar wrote:
> On Friday 16 May 2014 03:41 AM, Alex Shi wrote:
>> On 05/16/2014 02:36 AM, Santosh Shilimkar wrote:
>>>>>>> yes.
>>>>>>> My board is panda ES. without this revert, it works.
>>>>>
>>>>> Care to specify what linux version you are testing against?
>>>>>
>>>>> Does it hang in idle always immediately on booting?
>>>>>
>>>>> Or does the serial console first hang with sysrq still
>>>>> working (ctrl-a h in minicom for help) with device
>>>>> eventually locking up hard?
>>>>>
>>> I just posted an updated patch Alex on other thread.
>>> Attaching here again for your reference. Please try
>>> it out and see if the you still get a hang.
>>
>> it does not hang this time.
>>
> This is good news and exactly what I expected.
>  
>> but I am not sure it can solve my problem, since RCU stall is not easy
>> to reproduce in short time.
>>
> You may want to run the system longer if you can. I suspect the RCU stall
> was also side effect of missing interrupts.

Sure. it do remove the RCU stall on my panda board.

> 
> Regards,
> Santosh
> 


-- 
Thanks
    Alex