Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::ioscheduler_trace.elv_requeue_request - Fires when a request is
SYNOPSIS
ioscheduler_trace.elv_requeue_request
VALUES
name
Name of the probe point
disk_minor
Disk minor number of request.
elevator_name
The type of I/O elevator currently enabled.
rq
Address of request.
rq_flags
Request flags.
disk_major
Disk major no of request.
DESCRIPTION
put back on the queue, when the hadware cannot accept more requests.
SystemTap Tapset Reference March 2016 PROBE::IOSCHEDULER_T(3stap)