waitq
=====

::

   NAME
     waitq - list tasks queued on a wait queue

   SYNOPSIS
     waitq  [ symbol ] | [ struct.member struct_addr ] | [ address ]

   DESCRIPTION
     This command walks the wait queue list displaying the tasks which 
     are blocked on the specified wait queue.  The command differentiates
     between the old- and new-style wait queue structures used by the kernel.
     It can be invoked with the following argument types:

                        symbol  a global symbol of a wait queue.
     struct.member struct_addr  a structure name and wait queue member combination
                                followed by the structure's hexadecimal address.
                       address  a hexadecimal wait queue pointer.

   EXAMPLES

     Find out if any tasks are blocked on the "buffer_wait" wait queue:

       crash> waitq buffer_wait
       wait queue "buffer_wait" (c02927f0) is empty

     See who is blocked on the "wait_chldexit" queue of task c5496000:

       crash> waitq task_struct.wait_chldexit c5496000
       PID: 30879  TASK: c5496000  CPU: 0   COMMAND: "bash"

     Display the task list waiting on a known task queue:

       crash> waitq c3534098
       PID: 13691  TASK: c3534000  CPU: 1   COMMAND: "bash"