From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Alex Shi <alex.shi@linaro.org>, Tony Lindgren <tony@atomide.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
"naresh.kamboju@linaro.org Kamboju" <naresh.kamboju@linaro.org>,
Linaro Kernel <linaro-kernel@lists.linaro.org>,
LAK <linux-arm-kernel@lists.infradead.org>,
Mark Brown <broonie@linaro.org>,
linux-omap@vger.kernel.org
Subject: Re: RCU stall on panda
Date: Thu, 15 May 2014 11:05:53 +0200 [thread overview]
Message-ID: <53748371.5030704@linaro.org> (raw)
In-Reply-To: <53747E6D.60500@linaro.org>
On 05/15/2014 10:44 AM, Alex Shi wrote:
> On 05/13/2014 11:32 PM, Tony Lindgren wrote:
>> * Alex Shi <alex.shi@linaro.org> [140512 23:37]:
>>> On 05/13/2014 05:21 AM, Tony Lindgren wrote:
>>>> * Paul E. McKenney <paulmck@linux.vnet.ibm.com> [140505 11:11]:
>>>>> On Mon, May 05, 2014 at 05:39:43PM +0800, Alex Shi wrote:
>>>>>> I keep seeing the RCU stall problem on panda board from 3.10 kernel to latest upstream kernel
>>>>>> and google find some one report it before: https://lkml.org/lkml/2012/9/20/519
>>>>>>
>>>>>> Is it the hardware issue or a real software problem?
>>>>>
>>>>> I cannot distinguish between hardware and software from the trace below,
>>>>> but given that you are also seeing a soft lockup, either way you do
>>>>> appear to have a real problem as opposed to an RCU CPU stall warning
>>>>> false positive.
>>>>
>>>> Looks like you have CPU_IDLE enabled on panda. Hangs with current linux
>>>> next with CPU_IDLE are currently being discussed on the linux-omap list
>>>> in thread "omap4-panda-es boot issues with v3.15-rc4"
>>>>
>>>> I've seen occasional system hangs, and I've also noticed that doing
>>>> ctrl-a-f h or ctrl-a-f l for sysrq backtrace can unlock the system
>>>> producing similar errors to the below.
>>>>
>>>
>>> Thanks a lot for the info.
>>> In fact, the oops keeps in upstream kernel from 3.10 to latest.
>>
>> Care to test if the revert of commit cb7094 Santosh posted as
>> "[PATCH] ARM: OMAP4: Fix the boot regression with CPU_IDLE enabled"
>> solves the problem for you?
>>
>
> After enable this patch, system maybe hang in idle. :(
Hi Alex,
do you mean even with this revert applied, the board hangs in idle ?
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WARNING: multiple messages have this Message-ID (diff)
From: daniel.lezcano@linaro.org (Daniel Lezcano)
To: linux-arm-kernel@lists.infradead.org
Subject: RCU stall on panda
Date: Thu, 15 May 2014 11:05:53 +0200 [thread overview]
Message-ID: <53748371.5030704@linaro.org> (raw)
In-Reply-To: <53747E6D.60500@linaro.org>
On 05/15/2014 10:44 AM, Alex Shi wrote:
> On 05/13/2014 11:32 PM, Tony Lindgren wrote:
>> * Alex Shi <alex.shi@linaro.org> [140512 23:37]:
>>> On 05/13/2014 05:21 AM, Tony Lindgren wrote:
>>>> * Paul E. McKenney <paulmck@linux.vnet.ibm.com> [140505 11:11]:
>>>>> On Mon, May 05, 2014 at 05:39:43PM +0800, Alex Shi wrote:
>>>>>> I keep seeing the RCU stall problem on panda board from 3.10 kernel to latest upstream kernel
>>>>>> and google find some one report it before: https://lkml.org/lkml/2012/9/20/519
>>>>>>
>>>>>> Is it the hardware issue or a real software problem?
>>>>>
>>>>> I cannot distinguish between hardware and software from the trace below,
>>>>> but given that you are also seeing a soft lockup, either way you do
>>>>> appear to have a real problem as opposed to an RCU CPU stall warning
>>>>> false positive.
>>>>
>>>> Looks like you have CPU_IDLE enabled on panda. Hangs with current linux
>>>> next with CPU_IDLE are currently being discussed on the linux-omap list
>>>> in thread "omap4-panda-es boot issues with v3.15-rc4"
>>>>
>>>> I've seen occasional system hangs, and I've also noticed that doing
>>>> ctrl-a-f h or ctrl-a-f l for sysrq backtrace can unlock the system
>>>> producing similar errors to the below.
>>>>
>>>
>>> Thanks a lot for the info.
>>> In fact, the oops keeps in upstream kernel from 3.10 to latest.
>>
>> Care to test if the revert of commit cb7094 Santosh posted as
>> "[PATCH] ARM: OMAP4: Fix the boot regression with CPU_IDLE enabled"
>> solves the problem for you?
>>
>
> After enable this patch, system maybe hang in idle. :(
Hi Alex,
do you mean even with this revert applied, the board hangs in idle ?
--
<http://www.linaro.org/> Linaro.org ? Open source software for ARM SoCs
Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog
next prev parent reply other threads:[~2014-05-15 9:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-05 9:39 RCU stall on panda Alex Shi
2014-05-05 18:06 ` Paul E. McKenney
2014-05-12 21:21 ` Tony Lindgren
2014-05-12 21:21 ` Tony Lindgren
2014-05-13 6:36 ` Alex Shi
2014-05-13 6:36 ` Alex Shi
2014-05-13 15:32 ` Tony Lindgren
2014-05-13 15:32 ` Tony Lindgren
2014-05-15 8:44 ` Alex Shi
2014-05-15 8:44 ` Alex Shi
2014-05-15 9:05 ` Daniel Lezcano [this message]
2014-05-15 9:05 ` Daniel Lezcano
2014-05-15 13:26 ` Alex Shi
2014-05-15 13:26 ` Alex Shi
2014-05-15 18:32 ` Tony Lindgren
2014-05-15 18:32 ` Tony Lindgren
2014-05-15 18:36 ` Santosh Shilimkar
2014-05-15 18:36 ` Santosh Shilimkar
2014-05-16 7:41 ` Alex Shi
2014-05-16 7:41 ` Alex Shi
2014-05-16 13:37 ` Santosh Shilimkar
2014-05-16 13:37 ` Santosh Shilimkar
2014-05-22 8:59 ` Alex Shi
2014-05-22 8:59 ` Alex Shi
2014-05-22 13:36 ` Santosh Shilimkar
2014-05-22 13:36 ` Santosh Shilimkar
-- strict thread matches above, loose matches on Subject: below --
2014-05-05 9:38 Alex Shi
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