From: Guopeng Zhang <[email protected]> Create an isolated child which owns a CPU isolated at boot, then change its parent from isolated to root. Check that the change succeeds without altering the child or its isolated CPU.
Signed-off-by: Guopeng Zhang <[email protected]> --- .../selftests/cgroup/test_cpuset_prs.sh | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh index 9a1cce4807b4..bc8dbb724d5c 100755 --- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh +++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh @@ -1214,6 +1214,52 @@ test_boot_isolated() echo "$TEST_NAME test PASSED." } +# +# A parent's type change must validate only CPUs owned directly by the parent, +# not a boot-isolated CPU owned by a valid isolated child partition. +# +test_owned_cpus_housekeeping() +{ + TEST_NAME="Child-owned CPU type change" + get_boot_isolated_cpu "$TEST_NAME" || return 0 + echo "Running $TEST_NAME test ..." + + cd $CGROUP2/test + echo member > cpuset.cpus.partition + echo +cpuset > cgroup.subtree_control + echo 2,$BOOT_CPU > cpuset.cpus + [[ $(cat cpuset.cpus.effective) = "2,$BOOT_CPU" ]] || { + echo "$TEST_NAME test SKIPPED: CPUs 2,$BOOT_CPU are unavailable" + echo "" > cpuset.cpus + cd $CGROUP2 + return 0 + } + test_partition isolated + mkdir A1 + cd A1 + echo $BOOT_CPU > cpuset.cpus + test_partition isolated + cd .. + test_effective_cpus 2 + test_partition root + [[ $(cat A1/cpuset.cpus.partition) = isolated ]] || { + echo "Child partition changed during parent type change" + exit 1 + } + check_isolcpus "." || { + echo "Parent type change corrupted child isolation" + exit 1 + } + cd A1 + test_partition member + cd .. + rmdir A1 + test_partition member + echo "" > cpuset.cpus + cd $CGROUP2 + echo "$TEST_NAME test PASSED." +} + # # Wait for inotify event for the given file and read it # $1: cgroup file to wait for @@ -1286,5 +1332,6 @@ run_state_test TEST_MATRIX run_remote_state_test REMOTE_TEST_MATRIX test_isolated test_boot_isolated +test_owned_cpus_housekeeping test_inotify echo "All tests PASSED." -- 2.43.0
