************************* hanginfo *************************
  /exports/testreports/42551/testresults/racer-zfs-centos7_x86_64-centos7_x86_64/oleg409-client-timeout-core (3.10.0-7.9-debug) 
 *** UNINTERRUPTIBLE threads, classified ***

 ================== Waiting in io_schedule ==================
    ... 38 pids. Youngest,oldest: 9575, 4783  Ran ms ago: 1217440, 1519122
        printing 10 out of 38
        sorted by ran_ago, youngest first
      [9575, 8844, 9760, 8906, 8699, <28 skipped>, 4784, 10046, 9768,
       5283, 4783]

 ==================== Waiting on mutexes ====================
  -- <struct mutex 0xffff8800b0a1ac68> lustre_inode_cache 
   Owner: pid=10046 cmd=fallocate
    ... 6 pids. Youngest,oldest: 10975, 10163  Ran ms ago: 1517191, 1517828
        sorted by ran_ago, youngest first
      [10975, 10944, 10863, 10711, 10462, 10163]

*** Threads that own resources the other threads are waiting on ***

PID=10046  CPU=2 CMD=fallocate
  #0   __schedule+0x2e2
  #1   schedule+0x29
  #2   schedule_timeout+0x209
  #3   io_schedule_timeout+0xad
  #4   io_schedule+0x18
  #5   bit_wait_io+0x11
  #6   __wait_on_bit_lock+0x5f
  #7   __lock_page+0x74
  #8   __find_lock_page+0x66
  #9   find_lock_page+0xe
  #10  truncate_inode_pages_range+0x4d9
  #11  osc_discard_cb+0x20a
  #12  osc_page_gang_lookup+0x20f
  #13  osc_punch_start+0x8e
  #14  osc_io_setattr_start+0x57d
  #15  cl_io_start+0x6d
  #16  lov_io_call+0x5a
  #17  lov_io_start+0x56
  #18  lov_io_setattr_start+0x8b
  #19  cl_io_start+0x6d
  #20  cl_io_loop+0x9f
  #21  ll_fallocate+0x575
  #22  vfs_fallocate+0x13c
  #23  sys_fallocate+0x5b
  #24  system_call_fastpath+0x1f, 477 bytes of data
{10944, 10975, 10163, 10711, 10462, 10863}

*** System activities other threads are waiting for ***
  --- Doing io_schedule ---
{13312, 11531, 8844, 9873, 14612, 9877, 11416, 9753, 8603, 14492, 9760, 10784, 9378, 5283, 13604, 9768, 10024, 4783, 4784, 9268, 10037, 9526, 9783, 9782, 13367, 9402, 13243, 10046, 11840, 9414, 8906, 9305, 9575, 11883, 15597, 10222, 15733, 8699}


+++WARNING+++ Possible hang

******************************************************************************
************************ A Summary Of Problems Found *************************
******************************************************************************
-------------------- A list of all +++WARNING+++ messages --------------------
    Possible hang
------------------------------------------------------------------------------

 ** Execution took   1.03s (real)   0.80s (CPU), Child processes:   0.24s