On 05/15/2014 10:44 AM, Alex Shi wrote:
On 05/13/2014 11:32 PM, Tony Lindgren wrote:
* Alex Shi <alex.shi@xxxxxxxxxx> [140512 23:37]:
On 05/13/2014 05:21 AM, Tony Lindgren wrote:
* Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> [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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