lkml.org 
[lkml]   [2012]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH rcu 5/8] rcu: Dump only the current CPU's buffers for idle-entry/exit warnings
Date
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 --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! */
--
1.7.8


\
 
 \ /
  Last update: 2012-06-08 07:02    [W:0.058 / U:0.216 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site