************************* hanginfo *************************
  /exports/testreports/47154/testresults/sanity-pcc-zfs-centos7_x86_64-centos7_x86_64/oleg128-client-timeout-core (3.10.0-7.9-debug) 
 *** UNINTERRUPTIBLE threads, classified ***

 ================== Waiting in io_schedule ==================
    ... 1 pids. Youngest,oldest: 9561, 9561  Ran ms ago: 1895842, 1895842
        sorted by ran_ago, youngest first
      [9561]


 ********  Non-classified UN Threads ********** 1 in total

------- 1 stacks like that: ----------
  #0   __schedule
  #1   schedule
  #2   rwsem_down_read_failed
  #3   call_rwsem_down_read_failed
  #4   down_read
  #5   lov_io_init
  #6   __cl_io_init
  #7   cl_io_init
  #8   cl_sync_file_range
  #9   ll_writepages
  #10  do_writepages
  #11  __writeback_single_inode
  #12  writeback_sb_inodes
  #13  __writeback_inodes_wb
  #14  wb_writeback
  #15  bdi_writeback_workfn
  #16  process_one_work
  #17  worker_thread
  #18  kthread
  #19  ret_from_fork_nospec_begin

   ........................
     kworker/u8:1                   1 times

   ... PIDs ... 
         65 

*** System activities other threads are waiting for ***
  --- Doing io_schedule ---
{9561}


+++WARNING+++ Possible hang

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

 ** Execution took   0.35s (real)   0.35s (CPU)