On Mon, 2011-09-12 at 15:52 +0200, Mike Galbraith wrote: > 36717 <...>-6266 [002] 242.543129: sys_semop <-system_call_fastpath > 36718 <...>-6266 [002] 242.543129: sys_semtimedop <-sys_semop > 36719 <...>-6266 [002] 242.543131: ipc_lock_check <-sys_semtimedop > 36720 <...>-6266 [002] 242.543131: ipc_lock <-ipc_lock_check > 36721 <...>-6266 [002] 242.543132: __rcu_read_lock <-ipc_lock > 36722 <...>-6266 [002] 242.543133: migrate_disable <-ipc_lock > 36723 <...>-6266 [002] 242.543134: migrate_disable: migrate_disable: in_atomic:0 p->migrate_disable_atomic:0 p->migrate_disable:0 > 36724 <...>-6266 [002] 242.543134: pin_current_cpu <-migrate_disable > 36725 <...>-6266 [002] 242.543134: _raw_spin_lock_irqsave <-migrate_disable > 36726 <...>-6266 [002] 242.543135: _raw_spin_unlock_irqrestore <-migrate_disable > 36727 <...>-6266 [002] 242.543135: rt_spin_lock <-ipc_lock > 36728 <...>-6266 [002] 242.543136: ipcperms <-sys_semtimedop > 36729 <...>-6266 [002] 242.543137: ns_capable <-ipcperms > 36730 <...>-6266 [002] 242.543138: cap_capable <-ns_capable > 36731 <...>-6266 [002] 242.543138: pid_vnr <-sys_semtimedop > 36732 <...>-6266 [002] 242.543139: try_atomic_semop <-sys_semtimedop > 36733 <...>-6266 [002] 242.543140: do_smart_update <-sys_semtimedop > 36734 <...>-6266 [002] 242.543140: update_queue <-do_smart_update > 36735 <...>-6266 [002] 242.543141: try_atomic_semop <-update_queue > 36736 <...>-6266 [002] 242.543142: update_queue <-do_smart_update > 36737 <...>-6266 [002] 242.543142: try_atomic_semop <-update_queue > 36738 <...>-6266 [002] 242.543143: update_queue <-do_smart_update > 36739 <...>-6266 [002] 242.543143: try_atomic_semop <-update_queue > 36740 <...>-6266 [002] 242.543144: get_seconds <-do_smart_update > 36741 <...>-6266 [002] 242.543144: rt_spin_unlock <-sys_semtimedop > 36742 <...>-6266 [002] 242.543144: migrate_enable <-sys_semtimedop > 36743 <...>-6266 [002] 242.543145: migrate_enable: migrate_enable: in_atomic:1 p->migrate_disable_atomic:0 p->migrate_disable:1 Hm. Seems this is home grown a non-preemptive wakeup in the making. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
