Commit 945fa9c6 authored Mar 07, 2014 by Paul E. McKenney

torture: Dump ftrace buffer when the RCU grace period stalls



This commit adds a call to rcutorture_trace_dump() to dump the ftrace
buffer when the RCU grace period stalls in order to help debug the
stall.  Note that this is different than the RCU CPU stall warning,
as it is rcutorture detecting the stall rather than the underlying RCU
implementation.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

parent 499c632d

kernel/rcu/rcutorture.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1034,6 +1034,7 @@ rcu_torture_printk(char *page)
		"??? Writer stall state %d g%lu c%lu f%#x\n",
		rcu_torture_writer_state,
		gpnum, completed, flags);
		rcutorture_trace_dump();
		}
		rtcv_snap = rcu_torture_current_version;
		}

Admin message