linux-kernel - rcutorture: meaning of "End of test: RCU

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Date:   Tue, 22 Jan 2019 11:40:53 +0800
From:   Su Yue <suy.fnst@...fujitsu.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <paulmck@...ux.ibm.com>, <josh@...htriplett.org>,
        <rostedt@...dmis.org>, <mathieu.desnoyers@...icios.com>,
        <jiangshanlai@...il.com>, "Li, Philip" <philip.li@...el.com>,
        <lkp-developer@...ists.intel.com>
Subject: rcutorture: meaning of "End of test: RCU_HOTPLUG"

Hi, guys
   While running rcutorture tests with "onoff_interval", some tests
failed and results show like:

=====================================================================
[  316.354501] srcud-torture:--- End of test: RCU_HOTPLUG: nreaders=1 
nfakewriters=4 stat_interval=60 verbose=2 test_no_idle_hz=1 
shuffle_interval=3 stutter=5 irqreader=1 fq\
s_duration=0 fqs_holdoff=0 fqs_stutter=3 test_boost=1/0 
test_boost_interval=7 test_boost_duration=4 shutdown_secs=0 stall_cpu=0 
stall_cpu_holdoff=10 stall_cpu_irqsoff=0 n_ba\
rrier_cbs=0 onoff_interval=3 onoff_holdoff=0
====================================================================

I am wondering that meaning of "RCU_HOTPLUG". Is it expected because
cpu hotplug is enabled in the test? Or just represents another type of
failure?

Thanks,
Su