Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
probe::ioscheduler_trace.unplug_timer - Fires when unplug timer associated
SYNOPSIS
ioscheduler_trace.unplug_timer
VALUES
name
Name of the probe point
rq_queue
request queue
DESCRIPTION
with a request queue expires.
SEE ALSO
tapset::ioscheduler(3stap)
SystemTap Tapset Reference April 2016 PROBE::IOSCHEDULER_T(3stap)