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

NAME
probe::ioscheduler.elv_add_request.kp - kprobe based probe to indicate that a request was added to the
request queue
SYNOPSIS
ioscheduler.elv_add_request.kp
VALUES
q
pointer to request queue
disk_minor
Disk minor number of the request
elevator_name
The type of I/O elevator currently enabled
name
Name of the probe point
rq_flags
Request flags
disk_major
Disk major number of the request
rq
Address of the request
SystemTap Tapset Reference March 2016 PROBE::IOSCHEDULER(3stap)