On 8/11/26 5:58 AM, Shaojie Sun wrote:
Add a test case to REMOTE_TEST_MATRIX covering the bug fixed by
commit 345f40166694 ("cgroup/cpuset: Return only actually allocated
CPUs during partition invalidation"). The test verifies that when a
sibling partition root changes its cpuset.cpus to overlap with another
partition root, only actually allocated CPUs (effective_xcpus) are
returned to the parent, not all CPUs in cpus_allowed.
Signed-off-by: Shaojie Sun <[email protected]>
---
tools/testing/selftests/cgroup/test_cpuset_prs.sh | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh
b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
index 0d41aa0d343d..236cb1b38178 100755
--- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh
+++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
@@ -502,6 +502,12 @@ REMOTE_TEST_MATRIX=(
" C1-4:P1 . C1-2:P1 C1-3:P2 . . \
. . P0 C2-3 . . p1:1,4|c11:1|c12:2-3 \
p1:P1|c11:P0|c12:P2
2-3"
+ # Changing a sibling partition's cpuset.cpus to overlap with another
+ # sibling partition should invalidate itself and return only actually
+ # allocated CPUs (effective_xcpus) to the parent.
+ " C1-4:P1 . C1-2:P1 C2-4:P2 . . \
+ . . . C1-2 . . p1:3-4|c11:1-2|c12:3-4
\
+ p1:P1|c11:P1|c12:P-2"
)
#
Reviewed-by: Waiman Long <[email protected]>
