For kernel commit c4c27fbdda4e8ba87806c415b6d15266b07bce4b,
disallow attaching kthreadd or PF_THREAD_BOUND threads to cgroups.
The following testcases in cgroup_fj_testcases.sh will encounter
"echo: write error: Invalid argument" error while attach tasks to the cgroup.
function 1 1 1 1 1 3 1 1 1
function 1 1 1 1 1 3 2 1 1
function 1 1 1 1 1 3 4 1 1
Error messages as follows:
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 295: echo: write error:
Invalid argument
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10571 Killed
$TESTROOT/cgroup_fj_proc
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10573 Killed
$TESTROOT/cgroup_fj_proc
cgroup_test_fj 1 TFAIL : ltpapicmd.c:190: case98(function 1 1 1 1 1 3 1 1
1) FAIL
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 295: echo: write error:
Invalid argument
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10624 Killed
$TESTROOT/cgroup_fj_proc
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10626 Killed
$TESTROOT/cgroup_fj_proc
cgroup_test_fj 1 TFAIL : ltpapicmd.c:190: case99(function 1 1 1 1 1 3 2 1
1) FAIL
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 295: echo: write error:
Invalid argument
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10677 Killed
$TESTROOT/cgroup_fj_proc
/opt/ltp/testcases/bin/cgroup_fj_utility.sh: line 497: 10679 Killed
$TESTROOT/cgroup_fj_proc
cgroup_test_fj 1 TFAIL : ltpapicmd.c:190: case100(function 1 1 1 1
1 3 4 1 1) FAIL
So, we kindly avoid to attach these threads in cgroup tests.
Signed-off-by: Li Jinyue <lijin...@huawei.com>
---
testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
b/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
index 30476bd..7614308 100755
--- a/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
+++ b/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
@@ -186,6 +186,17 @@ case $attach_operation in
do
cur_pid=`sed -n "$i""p" $TMPFILE`
if [ -e /proc/$cur_pid/ ];then
+ #For kernel 3.4.0 and higher,kernel disallow attaching
kthreadd or
+ #PF_THREAD_BOUND threads to cgroups.
+ #kernel commit: c4c27fbdda4e8ba87806c415b6d15266b07bce4b
+ tst_kvercmp 3 4 0
+ if [ $? -ne 0 ]; then
+ thread_flag=$(awk '{print $9}'
/proc/$cur_pid/stat)
+ thread_name=$(awk '{print $2}'
/proc/$cur_pid/status | head -1)
+ if [ "$thread_name" = "kthreadd" -o
$((${thread_flag}&0x04000000)) -ne 0 ];then
+ continue
+ fi
+ fi
do_echo 1 1 "$cur_pid" /dev/cgroup/subgroup_1/tasks
fi
done
-- 1.8.2.2
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