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    SubjectRe: [ANNOUNCE] 3.0.4-rt13
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    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




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