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sched: Limit the number of scheduler debug messages

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Remove the verbose scheduler debug messages unless kernel
parameter "sched_debug" set.  /proc/sched_debug unchanged.

Signed-off-by: Mike Travis <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Roland Dreier <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: Hidetoshi Seto <[email protected]>
Cc: Jack Steiner <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Mike Travis 2009-11-17 18:22:15 -06:00 • committed by Ingo Molnar
commit f6630114d9
2 changed files with 15 additions and 0 deletions
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13
kernel/sched.c
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@ -7720,6 +7720,16 @@ early_initcall(migration_init);
#ifdef CONFIG_SCHED_DEBUG
static __read_mostly int sched_domain_debug_enabled;
static int __init sched_domain_debug_setup(char *str)
{
sched_domain_debug_enabled = 1;
return 0;
}
early_param("sched_debug", sched_domain_debug_setup);
static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
struct cpumask *groupmask)
{
@ -7806,6 +7816,9 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
cpumask_var_t groupmask;
int level = 0;
if (!sched_domain_debug_enabled)
return;
if (!sd) {
printk(KERN_DEBUG "CPU%d attaching NULL sched-domain.\n", cpu);
return;