diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index a50ed23bee777..032fdeba37d35 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -1235,6 +1235,8 @@ static void trace_sched_migrate_callback(void *data, struct task_struct *p, int } } +static bool monitor_enabled; + static int register_migration_monitor(void) { int ret = 0; @@ -1243,16 +1245,25 @@ static int register_migration_monitor(void) * Timerlat thread migration check is only required when running timerlat in user-space. * Thus, enable callback only if timerlat is set with no workload. */ - if (timerlat_enabled() && !test_bit(OSN_WORKLOAD, &osnoise_options)) + if (timerlat_enabled() && !test_bit(OSN_WORKLOAD, &osnoise_options)) { + if (WARN_ON_ONCE(monitor_enabled)) + return 0; + ret = register_trace_sched_migrate_task(trace_sched_migrate_callback, NULL); + if (!ret) + monitor_enabled = true; + } return ret; } static void unregister_migration_monitor(void) { - if (timerlat_enabled() && !test_bit(OSN_WORKLOAD, &osnoise_options)) - unregister_trace_sched_migrate_task(trace_sched_migrate_callback, NULL); + if (!monitor_enabled) + return; + + unregister_trace_sched_migrate_task(trace_sched_migrate_callback, NULL); + monitor_enabled = false; } #else static int register_migration_monitor(void) |