Commit 510f5acc authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1c83437e
......@@ -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:
*/
......
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