diff mbox

[rcu,5/8] rcu: Dump only the current CPU's buffers for idle-entry/exit warnings

Message ID 1339129615-1795-5-git-send-email-paulmck@linux.vnet.ibm.com
State Accepted
Commit bf1304e9cd755be7814ac8365834b7a1d0f06b58
Headers show

Commit Message

Paul E. McKenney June 8, 2012, 4:26 a.m. UTC 
From: "Paul E. McKenney" <paul.mckenney@linaro.org>

Problems in RCU idle entry and exit are almost always confined to the
offending CPU.  This commit therefore switches ftrace_dump() from
DUMP_ALL to DUMP_ORIG.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: Pascal Chapperon <pascal.chapperon@wanadoo.fr>
---
 kernel/rcutree.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 3b0f133..3b64896 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -357,7 +357,7 @@  static void rcu_idle_enter_common(struct rcu_dynticks *rdtp, long long oldval)
 		struct task_struct *idle = idle_task(smp_processor_id());
 
 		trace_rcu_dyntick("Error on entry: not idle task", oldval, 0);
-		ftrace_dump(DUMP_ALL);
+		ftrace_dump(DUMP_ORIG);
 		WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
 			  current->pid, current->comm,
 			  idle->pid, idle->comm); /* must be idle task! */
@@ -467,7 +467,7 @@  static void rcu_idle_exit_common(struct rcu_dynticks *rdtp, long long oldval)
 
 		trace_rcu_dyntick("Error on exit: not idle task",
 				  oldval, rdtp->dynticks_nesting);
-		ftrace_dump(DUMP_ALL);
+		ftrace_dump(DUMP_ORIG);
 		WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
 			  current->pid, current->comm,
 			  idle->pid, idle->comm); /* must be idle task! */