* Roosen Henri | 2016-06-30 16:05:09 [+0000]:

Hi,

Hi,

I just got an info-backtrace while running cyclictest on an iMX28 with kernel 4.1.27-rt30.
This resulted in a latency spike (i'm not sure whether caused by the trace dumping).
Can anyone share some info on this and what to do to prevent the cause of this info-trace?

Did you do anything else besides starting cyclictest?
RCU was somehow blocked and did not make any progress. This might if a
task in an RCU-read section got preempted for long time _or_ is active
in that section over a very long time. More information can be found at
  https://www.kernel.org/doc/Documentation/RCU/stallwarn.txt

Sebastian