From 945fa9c631b04febe295a3a2a00c7e4a3cfb97db Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 7 Mar 2014 14:15:28 -0800 Subject: 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 Reviewed-by: Josh Triplett --- kernel/rcu/rcutorture.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 80d2d2440210..9decce0f110c 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -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; } -- cgit v1.2.3