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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-07-17 20:47:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-10-06 12:47:08 +0200 |
| commit | 510f5acc4f4fb07f3f075900dc468d6e380beff6 (patch) | |
| tree | 4ecbc827da461c0a5c2ea41480ea42804fc63440 /kernel | |
| parent | 1c83437e80186832a9a48dbb6b8868d28e40e562 (diff) | |
| download | linux-stable-510f5acc4f4fb07f3f075900dc468d6e380beff6.tar.gz linux-stable-510f5acc4f4fb07f3f075900dc468d6e380beff6.tar.bz2 linux-stable-510f5acc4f4fb07f3f075900dc468d6e380beff6.zip | |
sched: Don't use tasklist_lock for debug prints
Avoid taking locks from debug prints, this avoids latencies on -rt,
and improves reliability of the debug code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index ce9a9e7db116..24637c782002 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -6021,7 +6021,7 @@ void show_state_filter(unsigned long state_filter) printk(KERN_INFO " task PC stack pid father\n"); #endif - read_lock(&tasklist_lock); + rcu_read_lock(); do_each_thread(g, p) { /* * reset the NMI-timeout, listing all files on a slow @@ -6037,7 +6037,7 @@ void show_state_filter(unsigned long state_filter) #ifdef CONFIG_SCHED_DEBUG sysrq_sched_debug_show(); #endif - read_unlock(&tasklist_lock); + rcu_read_unlock(); /* * Only show locks if all tasks are dumped: */ |