Commit-ID: 584c005951866792d552f21f7445e8104ce10f9c
Gitweb: https://git.kernel.org/tip/584c005951866792d552f21f7445e8104ce10f9c
Author: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
AuthorDate: Thu, 12 Oct 2017 18:12:57 -0400
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 28 Nov 2017 15:51:22 -0800
tracing, rcu: Remove no longer used trace event rcu_prep_idle
Commit c0f4dfd4f90 ("rcu: Make RCU_FAST_NO_HZ take advantage of
numbered callbacks") removed the only instances of trace_rcu_prep_idle,
but did not remove the TRACE_EVENT() that creates it. As defined trace
events take up memory within the kernel even when they are not used,
this is a waste of space. Remove the obsolete event.
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
include/trace/events/rcu.h | 40 ----------------------------------------
1 file changed, 40 deletions(-)
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index adf47c6..9bafeaf 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -458,45 +458,6 @@ TRACE_EVENT(rcu_dyntick,
);
/*
- * Tracepoint for RCU preparation for idle, the goal being to get RCU
- * processing done so that the current CPU can shut off its scheduling
- * clock and enter dyntick-idle mode. One way to accomplish this is
- * to drain all RCU callbacks from this CPU, and the other is to have
- * done everything RCU requires for the current grace period. In this
- * latter case, the CPU will be awakened at the end of the current grace
- * period in order to process the remainder of its callbacks.
- *
- * These tracepoints take a string as argument:
- *
- * "No callbacks": Nothing to do, no callbacks on this CPU.
- * "In holdoff": Nothing to do, holding off after unsuccessful attempt.
- * "Begin holdoff": Attempt failed, don't retry until next jiffy.
- * "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
- * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
- * "More callbacks": Still more callbacks, try again to clear them out.
- * "Callbacks drained": All callbacks processed, off to dyntick idle!
- * "Timer": Timer fired to cause CPU to continue processing callbacks.
- * "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
- * "Cleanup after idle": Idle exited, timer canceled.
- */
-TRACE_EVENT(rcu_prep_idle,
-
- TP_PROTO(const char *reason),
-
- TP_ARGS(reason),
-
- TP_STRUCT__entry(
- __field(const char *, reason)
- ),
-
- TP_fast_assign(
- __entry->reason = reason;
- ),
-
- TP_printk("%s", __entry->reason)
-);
-
-/*
* Tracepoint for the registration of a single RCU callback function.
* The first argument is the type of RCU, the second argument is
* a pointer to the RCU callback itself, the third element is the
@@ -803,7 +764,6 @@ TRACE_EVENT(rcu_barrier,
while (0)
#define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
#define trace_rcu_dyntick(polarity, oldnesting, newnesting, dyntick) do { } while (0)
-#define trace_rcu_prep_idle(reason) do { } while (0)
#define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
#define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
do { } while (0)
--
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