Re: constant call trace in log.

(oops, sending to the mailing list as well this time, sorry, folks.) Hi Max, Maybe this might be fixed in a more recent kernel. Have you tried one? See here for a range of reasons why a CPU stall warning might happen: http://www.kernel.org/doc/Documentation/RCU/stallwarn.txt So the report time after the RCU grace period starts is controlled by CONFIG_RCU_CPU_STALL_TIMEOUT, which is to be found under 'Kernel hacking ---> RCU CPU stall timeout in seconds' from menuconfig. Failing that at runtime you can change the values of rcu_cpu_stall_suppress and rcu_cpu_stall_timeout in /sys/module/rcutree/parameters/. Cheers Julie