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

NAME
probe::ioscheduler.elv_add_request.tp - tracepoint based probe to indicate a request is added to the
request queue.
SYNOPSIS
ioscheduler.elv_add_request.tp
VALUES
elevator_name
The type of I/O elevator currently enabled.
disk_minor
Disk minor number of request.
name
Name of the probe point
q
Pointer to request queue.
rq
Address of request.
disk_major
Disk major no of request.
rq_flags
Request flags.
SystemTap Tapset Reference March 2016 PROBE::IOSCHEDULER(3stap)