rcu: Dump ftrace buffer when kicking grace-period kthread
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 17 Feb 2016 19:54:28 +0000 (11:54 -0800)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Thu, 31 Mar 2016 20:36:37 +0000 (13:36 -0700)
commit5dffed1e5721f6deae4fd67d32386ef037c5fc56
tree58b771abe1f2344ac4a97454b4d405d8f7a685d7
parent293e2421fe25839500207eda123cc4475f8d17b8
rcu: Dump ftrace buffer when kicking grace-period kthread

If it is necessary to kick the grace-period kthread, that is a good
time to dump the trace buffer in order to learn why kicking was needed.
This commit therefore does the dump.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcu/tree.c