We need the following upstream commits:
ftrace: Only disable ftrace_enabled to test buffer in selftest
tracing: Clean up scheduling in trace_wakeup_test_thread()
A boot hang is seen in the trace kernel on MRG without these commits
commit 3ddee63a099ebbdc8f84697fe46730b58240c09d was applied to kernel tree in build kernel-rt-3.10.0-514.rt56.212.el6rt
Applied commit addff1feb02b03cb766b9a611c6b2cebf29bc285 to MRG tree. Should be available in kernel-rt-3.10.0-514.rt56.230.el6rt
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.