From 7f5d42d05155523a4c42c2c5170f2a368217aed5 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Wed, 31 Jan 2018 19:40:22 -0800 Subject: rcu: Trace expedited GP delays due to transitioning CPUs If a CPU is transitioning to or from offline state, an expedited grace period may undergo a timed wait. This timed wait can unduly delay grace periods, so this commit adds a trace statement to make it visible. Signed-off-by: Paul E. McKenney --- include/trace/events/rcu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/trace') diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h index e56a618f2a59..d8c33298c153 100644 --- a/include/trace/events/rcu.h +++ b/include/trace/events/rcu.h @@ -181,6 +181,7 @@ TRACE_EVENT(rcu_grace_period_init, * "start": Started a real expedited grace period. * "reset": Started resetting the tree * "select": Started selecting the CPUs to wait on. + * "selectofl": Selected CPU partially offline. * "startwait": Started waiting on selected CPUs. * "end": Ended a real expedited grace period. * "endwake": Woke piggybackers up. -- cgit