memcg_regression_test.sh revision 4548c6cf9bcdd96d8303caa4130ab638b61f8a30 
1#! /bin/sh
2
3################################################################################
4##                                                                            ##
5## Copyright (c) 2009 FUJITSU LIMITED                                         ##
6##                                                                            ##
7## This program is free software;  you can redistribute it and#or modify      ##
8## it under the terms of the GNU General Public License as published by       ##
9## the Free Software Foundation; either version 2 of the License, or          ##
10## (at your option) any later version.                                        ##
11##                                                                            ##
12## This program is distributed in the hope that it will be useful, but        ##
13## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ##
14## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   ##
15## for more details.                                                          ##
16##                                                                            ##
17## You should have received a copy of the GNU General Public License          ##
18## along with this program;  if not, write to the Free Software               ##
19## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA    ##
20##                                                                            ##
21## Author: Li Zefan <lizf@cn.fujitsu.com>                                     ##
22## Added memcg enable/disable functinality: Rishikesh K Rajak                 ##
23##                                              <risrajak@linux.vnet.ibm.com  ##
24##                                                                            ##
25################################################################################
26
27cd $LTPROOT/testcases/bin
28
29export TCID="memcg_regression_test"
30export TST_TOTAL=4
31export TST_COUNT=1
32
33if [ "$(id -ru)" != 0 ]; then
34	tst_brkm TBROK ignored "Test must be run as root"
35	exit 0
36fi
37
38if [ "x$(grep -w memory /proc/cgroups | cut -f4)" != "x1" ]; then
39	tst_resm TCONF "Either memory resource controller kernel support absent"
40	tst_resm TCONF "or feature is not enabled; skipping all memcgroup testcases."
41        exit 0
42fi
43
44tst_kvercmp 2 6 30
45if [ $? -eq 0 ]; then
46	tst_brkm TBROK ignored "Test should be run with kernel 2.6.30 or newer"
47	exit 0
48fi
49
50#buffer can rotate and number of found bugs can actually go down
51#so clear the buffer to avoid this
52dmesg -c > /dev/null
53nr_bug=0
54nr_null=0
55nr_warning=0
56nr_lockdep=0
57
58# check_kernel_bug - check if some kind of kernel bug happened
59check_kernel_bug()
60{
61	new_bug=`dmesg | grep -c "kernel BUG"`
62	new_null=`dmesg | grep -c "kernel NULL pointer dereference"`
63	new_warning=`dmesg | grep -c "^WARNING"`
64	new_lockdep=`dmesg | grep -c "possible recursive locking detected"`
65
66	# no kernel bug is detected
67	if [ $new_bug -eq $nr_bug -a $new_warning -eq $nr_warning -a \
68	     $new_null -eq $nr_null -a $new_lockdep -eq $nr_lockdep ]; then
69		return 1
70	fi
71
72	# some kernel bug is detected
73	if [ $new_bug -gt $nr_bug ]; then
74		tst_resm TFAIL "kernel BUG was detected!"
75	fi
76	if [ $new_warning -gt $nr_warning ]; then
77		tst_resm TFAIL "kernel WARNING was detected!"
78	fi
79	if [ $new_null -gt $nr_null ]; then
80		tst_resm "kernel NULL pointer dereference!"
81	fi
82	if [ $new_lockdep -gt $nr_lockdep ]; then
83		tst_resm "kernel lockdep warning was detected!"
84	fi
85
86	nr_bug=$new_bug
87	nr_null=$new_null
88	nr_warning=$new_warning
89	nr_lockdep=$new_lockdep
90
91	echo "check_kernel_bug found something!"
92	dmesg
93	failed=1
94	return 0
95}
96
97#---------------------------------------------------------------------------
98# Bug:    The bug was, while forking mass processes, trigger memcgroup OOM,
99#         then NULL pointer dereference may be hit.
100# Kernel: 2.6.25-rcX
101# Links:  http://lkml.org/lkml/2008/4/14/38
102# Fix:    commit e115f2d89253490fb2dbf304b627f8d908df26f1
103#---------------------------------------------------------------------------
104test_1()
105{
106	mkdir memcg/0/
107	echo 0 > memcg/0/memory.limit_in_bytes
108
109	./memcg_test_1
110
111	rmdir memcg/0/
112
113	check_kernel_bug
114	if [ $? -eq 1 ]; then
115		tst_resm TPASS "no kernel bug was found"
116	fi
117}
118
119#---------------------------------------------------------------------------
120# Bug:    Shrink memory might never return, unless send signal to stop it.
121# Kernel: 2.6.29
122# Links:  http://marc.info/?t=123199973900003&r=1&w=2
123#         http://lkml.org/lkml/2009/2/3/72
124# Fix:    81d39c20f5ee2437d71709beb82597e2a38efbbc
125#---------------------------------------------------------------------------
126test_2()
127{
128	./memcg_test_2 &
129	pid1=$!
130	sleep 1
131
132	mkdir memcg/0
133	echo $pid1 > memcg/0/tasks
134
135	# let pid1 'test_2' allocate memory
136	/bin/kill -SIGUSR1 $pid1
137	sleep 1
138
139	# shrink memory
140	echo 1 > memcg/0/memory.limit_in_bytes 2>&1 &
141	pid2=$!
142
143	# check if 'echo' will exit and exit with failure
144	for tmp in $(seq 0 4); do
145		sleep 1
146		ps -p $! > /dev/null
147		if [ $? -ne 0 ]; then
148			wait $pid2
149			if [ $? -eq 0 ]; then
150				tst_resm TFAIL "echo should return failure"
151				failed=1
152				kill -9 $pid1 $pid2 > /dev/null 2>&1
153				wait $pid1 $pid2
154				rmdir memcg/0
155			fi
156			break
157		fi
158	done
159
160	if [ $tmp -eq 5 ]; then
161		tst_resm TFAIL "'echo' doesn't exit!"
162		failed=1
163	else
164		tst_resm TPASS "EBUSY was returned as expected"
165	fi
166
167	kill -9 $pid1 $pid2 > /dev/null 2>&1
168	wait $pid1 $pid2 > /dev/null 2>&1
169	rmdir memcg/0
170}
171
172#---------------------------------------------------------------------------
173# Bug:    crash when rmdir a cgroup on IA64
174# Kernel: 2.6.29-rcX
175# Links:  http://marc.info/?t=123235660300001&r=1&w=2
176# Fix:    commit 299b4eaa302138426d5a9ecd954de1f565d76c94
177#---------------------------------------------------------------------------
178test_3()
179{
180	mkdir memcg/0
181	for pid in `cat memcg/tasks`; do
182		echo $pid > memcg/0/tasks 2> /dev/null
183	done
184
185	for pid in `cat memcg/0/tasks`; do
186		echo $pid > memcg/tasks 2> /dev/null
187	done
188	rmdir memcg/0
189
190	check_kernel_bug
191	if [ $? -eq 1 ]; then
192		tst_resm TPASS "no kernel bug was found"
193	fi
194}
195
196#---------------------------------------------------------------------------
197# Bug:    the memcg's refcnt handling at swapoff was wrong, causing crash
198# Kernel: 2.6.29-rcX
199# Links:  http://marc.info/?t=123208656300004&r=1&w=2
200# Fix:    commit 85d9fc89fb0f0703df6444f260187c088a8d59ff
201#---------------------------------------------------------------------------
202test_4()
203{
204	./memcg_test_4.sh
205
206	check_kernel_bug
207	if [ $? -eq 1 ]; then
208		tst_resm TPASS "no kernel bug was found"
209	fi
210
211	# test_4.sh might be killed by oom, so do clean up here
212	killall -9 memcg_test_4 2> /dev/null
213	killall -9 memcg_test_4.sh 2> /dev/null
214
215	# if test_4.sh gets killed, it won't clean cgroup it created
216	rmdir memcg/0 2> /dev/null
217
218	swapon -a
219}
220
221# main
222failed=0
223mkdir memcg/
224
225for cur in $(seq 1 $TST_TOTAL); do
226	export TST_COUNT=$cur
227
228	mount -t cgroup -o memory xxx memcg/
229	if [ $? -ne 0 ]; then
230		tst_resm TFAIL "failed to mount memory subsytem"
231		failed=1
232		continue
233	fi
234
235	test_$cur
236
237	umount memcg/
238done
239
240rmdir memcg/
241
242exit $failed
243
244