[PATCH 13/17] selftests/cgroup: Test child invalidation after shrinking cpuset.cpus

[Guopeng Zhang]

From: Guopeng Zhang <zhangguopeng@xxxxxxxxxx>

Shrink a parent CPU mask in root/root, root/isolated and isolated/root
configurations. Check that the child becomes invalid and that effective
and isolated CPU masks reflect the new ownership.

Signed-off-by: Guopeng Zhang <zhangguopeng@xxxxxxxxxx>
---
 tools/testing/selftests/cgroup/test_cpuset_prs.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
index fb11a3ab0f35..7345e89e22b7 100755
--- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh
+++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
@@ -331,6 +331,11 @@ TEST_MATRIX=(
 	" C0-3:X1-3:P2 C1-3:X2-3:P2 C2-3:X3:P2 \
 				   .      .    C4:X     .      .     0 A1:1-3|A2:1-3|A3:2-3|XA2:|XA3: A1:P2|A2:P-2|A3:P-2 1-3"
 
+	# A child outside its parent's new CPU mask becomes invalid
+	" C0-3:P1  C2-3:P1  .      .    C0-2     .      .      .     0 A1:0-2|A2:2 A1:P1|A2:P-1"
+	" C0-3:P1  C2-3:P2  .      .    C0-2     .      .      .     0 A1:0-2|A2:2 A1:P1|A2:P-2 ."
+	" C0-3:P2  C2-3:P1  .      .    C0-2     .      .      .     0 A1:0-2|A2:2 A1:P2|A2:P-1 0-2"
+
 	# Direct invalidation returns child CPUs to the parent or its owner
 	" C1-4:P2  C3-4:P1  .      . T:O1=0:O2=0:O4=0 . .      . \
 					   0 A1:3|A2:3 A1:P2|A2:P-1 1-4"
-- 
2.43.0