Provided by: systemtap_0.0.20071201-1_i386 bug

NAME

       stapprobes.iosched - systemtap IO scheduler probe points

DESCRIPTION

       This  family  of  probe  points  is  used  to  probe  the  IO scheduler
       activities.  It contains the following probe points:

       ioscheduler.elv_next_request
              Fires when retrieves a request from request queue

              Arguments:

              elevator_name
                The elevator name

       ioscheduler.elv_next_request.return
              Fires when return from retrieving a request

              Arguments:

              req
                Address of the request

              req_flags
                request flags

              disk_major
                disk major number of the request

              disk_minor
                disk minor number of the request

       ioscheduler.elv_add_request
              Fires when add a request into request queue

              Arguments:

              elevator_name
                The elevator name

              req
                Address of the request

              req_flags
                request flags

              disk_major
                disk major number of the request

              disk_minor
                disk minor number of the request

       ioscheduler.elv_completed_request
              Fires when a request is completed

              Arguments:

              elevator_name
                The elevator name

              req
                Address of the request

              req_flags
                request flags

              disk_major
                disk major number of the request

              disk_minor
                disk minor number of the request

SEE ALSO

       stap(1), stapprobes(5),