Commit-ID: bf1304e9cd755be7814ac8365834b7a1d0f06b58
Gitweb: http://git.kernel.org/tip/bf1304e9cd755be7814ac8365834b7a1d0f06b58
Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx>
AuthorDate: Wed, 9 May 2012 15:55:39 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 2 Jul 2012 12:34:42 -0700
rcu: Dump only the current CPU's buffers for idle-entry/exit warnings
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@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Tested-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Tested-by: Pascal Chapperon <pascal.chapperon@xxxxxxxxxx>
---
kernel/rcutree.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 4b97bba..6eb48f1 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -358,7 +358,7 @@ 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! */
@@ -468,7 +468,7 @@ 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! */
--
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