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timers: /proc/sys sysctl hook to enable timer migration
* Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-04-16 12:11:36]: This patch creates the /proc/sys sysctl interface at /proc/sys/kernel/timer_migration Timer migration is enabled by default. To disable timer migration, when CONFIG_SCHED_DEBUG = y, echo 0 > /proc/sys/kernel/timer_migration Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -1766,6 +1766,7 @@ extern unsigned int sysctl_sched_child_runs_first;
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extern unsigned int sysctl_sched_features;
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extern unsigned int sysctl_sched_migration_cost;
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extern unsigned int sysctl_sched_nr_migrate;
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extern unsigned int sysctl_timer_migration;
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int sched_nr_latency_handler(struct ctl_table *table, int write,
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struct file *file, void __user *buffer, size_t *length,
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@ -8731,6 +8731,8 @@ void __init sched_init_smp(void)
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}
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#endif /* CONFIG_SMP */
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const_debug unsigned int sysctl_timer_migration = 1;
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int in_sched_functions(unsigned long addr)
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{
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return in_lock_functions(addr) ||
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@ -324,6 +324,14 @@ static struct ctl_table kern_table[] = {
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "timer_migration",
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.data = &sysctl_timer_migration,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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#endif
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{
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.ctl_name = CTL_UNNUMBERED,
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