Hi all Gently ping. Best regards, Ma > Hi guys, > > I ran the LTP case "cgroup cgroup_regression_test.sh" on Cento10, and found > that if mounting cgroup immediately after umount, it will report error "cgroup > already mounted or mount point busy." > > But this does not occur on old kernel(such as Centos9). > Could someone help take a look? > > Reproduce Step: > ``` > # mkdir cgroup > # mount -t cgroup -o none,name=foo cgroup cgroup # umount cgroup && > mount -t cgroup -o none,name=foo cgroup cgroup > mount: /opt/ltp/tmpdir/cgroup: cgroup already mounted or mount point busy. > dmesg(1) may have more information after failed mount system call. > ``` > > LTP failed case: > ``` > Running tests....... > <<<test_start>>> > tag=cgroup stime=1735584666 > cmdline="cgroup_regression_test.sh" > contacts="" > analysis=exit > <<<test_output>>> > incrementing stop > cgroup_regression_test 1 TINFO: Running: cgroup_regression_test.sh > cgroup_regression_test 1 TINFO: Tested kernel: Linux > 6.11.0-0.rc5.23.el10.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Sep 23 04:19:12 > EDT 2024 x86_64 GNU/Linux cgroup_regression_test 1 TINFO: Using > /tmp/ltp-q3TtUTWV42/LTP_cgroup_regression_test.68LuGosjOZ as tmpdir (xfs > filesystem) cgroup_regression_test 1 TINFO: timeout per run is 0h 5m 0s > cgroup_regression_test 1 TPASS: no kernel bug was found > mount: > /tmp/ltp-q3TtUTWV42/LTP_cgroup_regression_test.68LuGosjOZ/cgroup: > cgroup already mounted or mount point busy. > dmesg(1) may have more information after failed mount system call. > cgroup_regression_test 2 TFAIL: Failed to mount cgroup filesystem > cgroup_regression_test 3 TCONF: CONFIG_SCHED_DEBUG is not enabled > cgroup_regression_test 4 TCONF: CONFIG_LOCKDEP is not enabled > cgroup_regression_test 5 TINFO: The > '/tmp/ltp-q3TtUTWV42/LTP_cgroup_regression_test.68LuGosjOZ/cgroup' is not > mounted, skipping umount cgroup_regression_test 5 TPASS: no kernel bug was > found cgroup_regression_test 6 TPASS: no kernel bug was found > cgroup_regression_test 7 TPASS: no kernel bug was found for test 1 > cgroup_regression_test 7 TCONF: skip rest of testing due possible oops triggered > by reading /proc/sched_debug cgroup_regression_test 7 TPASS: no kernel bug > was found for test 2 cgroup_regression_test 8 TPASS: no kernel bug was found > > Summary: > passed 6 > failed 1 > broken 0 > skipped 3 > warnings 0 > <<<execution_status>>> > initiation_status="ok" > duration=62 termination_type=exited termination_id=1 corefile=no > cutime=4420 cstime=7914 > <<<test_end>>> > INFO: ltp-pan reported some tests FAIL > LTP Version: 20240524-400-gec81cf213 > ``` > > Best regards > Ma > > -- > Mailing list info: https://lists.linux.it/listinfo/ltp
