Ceph

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existing dependency PG::_lock (50) -> OSD::op_tp::lock (24) at:
 ceph version 0.43-138-g97b2e74 (commit:97b2e741423a8a9801ead843141a490043f7788b)
2012-03-08 09:16:18.983547 1: (Mutex::Lock(bool)+0x41) [0xb00eb5]
2012-03-08 09:16:18.983559 2: (ThreadPool::WorkQueue<PG>::queue(PG*)+0x29) [0xb18a11]
2012-03-08 09:16:18.983567 3: (OSD::enqueue_op(PG*, OpRequest*)+0x28f) [0xba6033]
2012-03-08 09:16:18.983574 4: (OSD::handle_op(OpRequest*)+0xeca) [0xba3f3e]
2012-03-08 09:16:18.983581 5: (OSD::dispatch_op(OpRequest*)+0x146) [0xb8b014]
2012-03-08 09:16:18.983587 6: (OSD::_dispatch(Message*)+0x887) [0xb8b8c9]
2012-03-08 09:16:18.983594 7: (OSD::ms_dispatch(Message*)+0x165) [0xb8a13d]
2012-03-08 09:16:18.983600 8: (Messenger::ms_deliver_dispatch(Message*)+0x89) [0xcc25ff]
2012-03-08 09:16:18.983607 9: (SimpleMessenger::dispatch_entry()+0x768) [0xcac3d0]
2012-03-08 09:16:18.983614 10: (SimpleMessenger::DispatchThread::entry()+0x1c) [0xaae85c]
2012-03-08 09:16:18.983621 11: (Thread::_entry_func(void*)+0x23) [0xccaea5]
2012-03-08 09:16:18.983634 12: (()+0x6b50) [0x7f425377cb50]
2012-03-08 09:16:18.983640 13: (clone()+0x6d) [0x7f4251db090d]
2012-03-08 09:16:18.983645 2012-03-08 09:16:18.983654 7f4246aa8700 existing intermediate dependency OSD::map_lock (32) -> PG::_lock (50) at:
 ceph version 0.43-138-g97b2e74 (commit:97b2e741423a8a9801ead843141a490043f7788b)
2012-03-08 09:16:18.983661 1: (Mutex::Lock(bool)+0x41) [0xb00eb5]
2012-03-08 09:16:18.983667 2: (PG::lock_with_map_lock_held(bool)+0x27) [0xd80617]
2012-03-08 09:16:18.983675 3: (OSD::advance_map(ObjectStore::Transaction&, C_Contexts*)+0x1324) [0xb92f9e]
2012-03-08 09:16:18.983682 4: (OSD::handle_osd_map(MOSDMap*)+0x20f2) [0xb8ffee]
2012-03-08 09:16:18.983688 5: (OSD::_dispatch(Message*)+0x4be) [0xb8b500]
2012-03-08 09:16:18.983695 6: (OSD::ms_dispatch(Message*)+0x165) [0xb8a13d]
2012-03-08 09:16:18.983701 7: (Messenger::ms_deliver_dispatch(Message*)+0x89) [0xcc25ff]
2012-03-08 09:16:18.983707 8: (SimpleMessenger::dispatch_entry()+0x768) [0xcac3d0]
2012-03-08 09:16:18.983714 9: (SimpleMessenger::DispatchThread::entry()+0x1c) [0xaae85c]
2012-03-08 09:16:18.983728 10: (Thread::_entry_func(void*)+0x23) [0xccaea5]
2012-03-08 09:16:18.983735 11: (()+0x6b50) [0x7f425377cb50]
2012-03-08 09:16:18.983741 12: (clone()+0x6d) [0x7f4251db090d]
2012-03-08 09:16:18.983745 2012-03-08 09:16:18.983752 7f4246aa8700 new dependency OSD::op_tp::lock (24) -> OSD::map_lock (32) creates a cycle at
 ceph version 0.43-138-g97b2e74 (commit:97b2e741423a8a9801ead843141a490043f7788b)
2012-03-08 09:16:18.983760 1: (PG::lock(bool)+0x28) [0xd80562]
2012-03-08 09:16:18.983766 2: (OSD::handle_osd_map(MOSDMap*)+0xbe3) [0xb8eadf]
2012-03-08 09:16:18.983772 3: (OSD::_dispatch(Message*)+0x4be) [0xb8b500]
2012-03-08 09:16:18.983778 4: (OSD::ms_dispatch(Message*)+0x165) [0xb8a13d]
2012-03-08 09:16:18.983784 5: (Messenger::ms_deliver_dispatch(Message*)+0x89) [0xcc25ff]
2012-03-08 09:16:18.983790 6: (SimpleMessenger::dispatch_entry()+0x768) [0xcac3d0]
2012-03-08 09:16:18.983797 7: (SimpleMessenger::DispatchThread::entry()+0x1c) [0xaae85c]
2012-03-08 09:16:18.983803 8: (Thread::_entry_func(void*)+0x23) [0xccaea5]
2012-03-08 09:16:18.983809 9: (()+0x6b50) [0x7f425377cb50]
2012-03-08 09:16:18.983815 10: (clone()+0x6d) [0x7f4251db090d]
2012-03-08 09:16:18.983819 2012-03-08 09:16:18.983823 7f4246aa8700 btw, i am holding these locks:
2012-03-08 09:16:18.983829 7f4246aa8700   OSD::osd_lock (21)
2012-03-08 09:16:18.983834 7f4246aa8700   OSD::op_tp::lock (24)
2012-03-08 09:16:18.983839 7f4246aa8700 

common/lockdep.cc: In function 'int lockdep_will_lock(const char*, int)' thread 7f4246aa8700 time 2012-03-08 09:16:18.983846
common/lockdep.cc: 201: FAILED assert(0)
 ceph version 0.43-138-g97b2e74 (commit:97b2e741423a8a9801ead843141a490043f7788b)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0xae) [0xcd5fba]
 2: (lockdep_will_lock(char const*, int)+0x8f8) [0xd4f37f]
 3: (RWLock::get_read()+0x32) [0xbac714]
 4: (PG::lock(bool)+0x28) [0xd80562]
 5: (OSD::handle_osd_map(MOSDMap*)+0xbe3) [0xb8eadf]
 6: (OSD::_dispatch(Message*)+0x4be) [0xb8b500]
 7: (OSD::ms_dispatch(Message*)+0x165) [0xb8a13d]
 8: (Messenger::ms_deliver_dispatch(Message*)+0x89) [0xcc25ff]
 9: (SimpleMessenger::dispatch_entry()+0x768) [0xcac3d0]
 10: (SimpleMessenger::DispatchThread::entry()+0x1c) [0xaae85c]
 11: (Thread::_entry_func(void*)+0x23) [0xccaea5]
 12: (()+0x6b50) [0x7f425377cb50]
 13: (clone()+0x6d) [0x7f4251db090d]