selftests: cgroup: Add basic tests for pids controller

This commit adds (and wires in) new test program for checking basic pids
controller functionality -- restricting tasks in a cgroup and correct

selftests: cgroup: Add basic tests for pids controller

This commit adds (and wires in) new test program for checking basic pids
controller functionality -- restricting tasks in a cgroup and correct
event counting.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests: cgroup: Lexicographic order in Makefile

This will reduce number of conflicts when modifying the lists.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <tj@kernel

selftests: cgroup: Lexicographic order in Makefile

This will reduce number of conflicts when modifying the lists.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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cgroup/cpuset: Add test_cpuset_v1_hp.sh

Add a simple test to verify that an empty v1 cpuset will force its tasks
to be moved to an ancestor node. It is based on the test case documented
in commit 76

cgroup/cpuset: Add test_cpuset_v1_hp.sh

Add a simple test to verify that an empty v1 cpuset will force its tasks
to be moved to an ancestor node. It is based on the test case documented
in commit 76bb5ab8f6e3 ("cpuset: break kernfs active protection in
cpuset_write_resmask()").

Signed-off-by: Waiman Long <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests: add a selftest to verify hugetlb usage in memcg

This patch add a new kselftest to demonstrate and verify the new hugetlb
memcg accounting behavior.

Link: https://lkml.kernel.org/r/202310

selftests: add a selftest to verify hugetlb usage in memcg

This patch add a new kselftest to demonstrate and verify the new hugetlb
memcg accounting behavior.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Nhat Pham <[email protected]>
Cc: Frank van der Linden <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Tejun heo <[email protected]>
Cc: Yosry Ahmed <[email protected]>
Cc: Zefan Li <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests: cgroup: add test_zswap program

Patch series "selftests: cgroup: add zswap test program".

This series adds 2 zswap related selftests that verify known and fixed
issues. A new dedicated t

selftests: cgroup: add test_zswap program

Patch series "selftests: cgroup: add zswap test program".

This series adds 2 zswap related selftests that verify known and fixed
issues. A new dedicated test program (test_zswap) is proposed since the
test cases are specific to zswap and hosts specific helpers.

The first patch adds the (empty) test program, while the other 2 add an
actual test function each.


This patch (of 3):

Add empty cgroup-zswap self test scaffold program, test functions to be
added in the next commits.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Domenico Cerasuolo <[email protected]>
Cc: Dan Streetman <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Nhat Pham <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Seth Jennings <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vitaly Wool <[email protected]>
Cc: Zefan Li <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests: cgroup: Add cpuset migrations testcase

Add a separate testfile to verify treating permissions when tasks are
migrated on cgroup v2 hierarchy between cpuset cgroups.

In accordance with v2

selftests: cgroup: Add cpuset migrations testcase

Add a separate testfile to verify treating permissions when tasks are
migrated on cgroup v2 hierarchy between cpuset cgroups.

In accordance with v2 design, migration should be allowed based on
delegation boundaries (i.e. cgroup.procs permissions) and does not
depend on the migrated object (i.e. unprivileged process can migrate
another process (even privileged) as long as it remains in the original
dedicated scope).

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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kselftest/cgroup: Add cpuset v2 partition root state test

Add a test script test_cpuset_prs.sh with a helper program wait_inotify
for exercising the cpuset v2 partition root state code.

Signed-off-

kselftest/cgroup: Add cpuset v2 partition root state test

Add a test script test_cpuset_prs.sh with a helper program wait_inotify
for exercising the cpuset v2 partition root state code.

Signed-off-by: Waiman Long <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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cgroup: Add new test_cpu.c test suite in cgroup selftests

The cgroup selftests suite currently contains tests that validate various
aspects of cgroup, such as validating the expected behavior for me

cgroup: Add new test_cpu.c test suite in cgroup selftests

The cgroup selftests suite currently contains tests that validate various
aspects of cgroup, such as validating the expected behavior for memory
controllers, the expected behavior of cgroup.procs, etc. There are no tests
that validate the expected behavior of the cgroup cpu controller.

This patch therefore adds a new test_cpu.c file that will contain cpu
controller testcases. The file currently only contains a single testcase
that validates creating nested cgroups with cgroup.subtree_control
including cpu. Future patches will add more sophisticated testcases that
validate functional aspects of the cpu controller.

Signed-off-by: David Vernet <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests: cgroup: build error multiple outpt files

When building selftests/cgroup: with clang the following error are seen:

clang -Wall -pthread test_memcontrol.c cgroup_util.c ../clone3/clone3

selftests: cgroup: build error multiple outpt files

When building selftests/cgroup: with clang the following error are seen:

clang -Wall -pthread test_memcontrol.c cgroup_util.c ../clone3/clone3_selftests.h -o .../builds/current/kselftest/cgroup/test_memcontrol
clang: error: cannot specify -o when generating multiple output files
make[3]: *** [../lib.mk:146: .../builds/current/kselftest/cgroup/test_memcontrol] Error 1

Rework to add the header files to LOCAL_HDRS before including ../lib.mk,
since the dependency is evaluated in '$(OUTPUT)/%:%.c $(LOCAL_HDRS)' in
file lib.mk.

Suggested-by: Arnd Bergmann <[email protected]>
Signed-off-by: Anders Roxell <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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tests/cgroup: test cgroup.kill

Test that the new cgroup.kill feature works as intended.

Link: https://lore.kernel.org/r/[email protected]
Cc: Shakeel Butt <shakeelb@google

tests/cgroup: test cgroup.kill

Test that the new cgroup.kill feature works as intended.

Link: https://lore.kernel.org/r/[email protected]
Cc: Shakeel Butt <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: [email protected]
Acked-by: Roman Gushchin <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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kselftests: cgroup: add kernel memory accounting tests

Add some tests to cover the kernel memory accounting functionality. These
are covering some issues (and changes) we had recently.

1) A test w

kselftests: cgroup: add kernel memory accounting tests

Add some tests to cover the kernel memory accounting functionality. These
are covering some issues (and changes) we had recently.

1) A test which allocates a lot of negative dentries, checks memcg slab
statistics, creates memory pressure by setting memory.max to some low
value and checks that some number of slabs was reclaimed.

2) A test which covers side effects of memcg destruction: it creates
and destroys a large number of sub-cgroups, each containing a
multi-threaded workload which allocates and releases some kernel
memory. Then it checks that the charge ans memory.stats do add up on
the parent level.

3) A test which reads /proc/kpagecgroup and implicitly checks that it
doesn't crash the system.

4) A test which spawns a large number of threads and checks that the
kernel stacks accounting works as expected.

5) A test which checks that living charged slab objects are not
preventing the memory cgroup from being released after being deleted by
a user.

Signed-off-by: Roman Gushchin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

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selftests/cgroup: add tests for cloning into cgroups

Expand the cgroup test-suite to include tests for CLONE_INTO_CGROUP.
This adds the following tests:
- CLONE_INTO_CGROUP manages to clone a proces

selftests/cgroup: add tests for cloning into cgroups

Expand the cgroup test-suite to include tests for CLONE_INTO_CGROUP.
This adds the following tests:
- CLONE_INTO_CGROUP manages to clone a process directly into a correctly
delegated cgroup
- CLONE_INTO_CGROUP fails to clone a process into a cgroup that has been
removed after we've opened an fd to it
- CLONE_INTO_CGROUP fails to clone a process into an invalid domain
cgroup
- CLONE_INTO_CGROUP adheres to the no internal process constraint
- CLONE_INTO_CGROUP works with the freezer feature

Cc: Tejun Heo <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: [email protected]
Cc: [email protected]
Acked-by: Roman Gushchin <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests: cgroup: Run test_core under interfering stress

test_core tests various cgroup creation/removal and task migration
paths. Run the tests repeatedly with interfering noise (for lockdep
check

selftests: cgroup: Run test_core under interfering stress

test_core tests various cgroup creation/removal and task migration
paths. Run the tests repeatedly with interfering noise (for lockdep
checks). Currently, forking noise and subsystem enabled/disabled
switching are the implemented noises.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests: cgroup: Add task migration tests

Add two new tests that verify that thread and threadgroup migrations
work as expected.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tej

selftests: cgroup: Add task migration tests

Add two new tests that verify that thread and threadgroup migrations
work as expected.

Signed-off-by: Michal Koutný <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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kselftests: cgroup: add freezer controller self-tests

This patch implements 9 tests for the freezer controller for
cgroup v2:
1) a simple test, which aims to freeze and unfreeze a cgroup with 100
pr

kselftests: cgroup: add freezer controller self-tests

This patch implements 9 tests for the freezer controller for
cgroup v2:
1) a simple test, which aims to freeze and unfreeze a cgroup with 100
processes
2) a more complicated tree test, which creates a hierarchy of cgroups,
puts some processes in some cgroups, and tries to freeze and unfreeze
different parts of the subtree
3) a forkbomb test: the test aims to freeze a forkbomb running in a
cgroup, kill all tasks in the cgroup and remove the cgroup without
the unfreezing.
4) rmdir test: the test creates two nested cgroups, freezes the parent
one, checks that the child can be successfully removed, and a new
child can be created
5) migration tests: the test checks migration of a task between
frozen cgroups: from a frozen to a running, from a running to a
frozen, and from a frozen to a frozen.
6) ptrace test: the test checks that it's possible to attach to
a process in a frozen cgroup, get some information and detach, and
the cgroup will remain frozen.
7) stopped test: the test checks that it's possible to freeze a cgroup
with a stopped task
8) ptraced test: the test checks that it's possible to freeze a cgroup
with a ptraced task
9) vfork test: the test checks that it's possible to freeze a cgroup
with a parent process waiting for the child process in vfork()

Expected output:
$ ./test_freezer
ok 1 test_cgfreezer_simple
ok 2 test_cgfreezer_tree
ok 3 test_cgfreezer_forkbomb
ok 4 test_cgrreezer_rmdir
ok 5 test_cgfreezer_migrate
ok 6 test_cgfreezer_ptrace
ok 7 test_cgfreezer_stopped
ok 8 test_cgfreezer_ptraced
ok 9 test_cgfreezer_vfork

Signed-off-by: Roman Gushchin <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: [email protected]
Cc: [email protected]

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Add cgroup core selftests

This commit adds tests for some of the core functionalities
of cgroups v2.

The commit adds tests for some core principles of croup V2 API:

- test_cgcore_internal_process_

Add cgroup core selftests

This commit adds tests for some of the core functionalities
of cgroups v2.

The commit adds tests for some core principles of croup V2 API:

- test_cgcore_internal_process_constraint

Tests internal process constraint.
You can't add a pid to a domain parent if a controller is enabled.

- test_cgcore_top_down_constraint_enable

Tests that you can't enable a controller on a child if it's not enabled
on the parent.

- test_cgcore_top_down_constraint_disable

Tests that you can't disable a controller on a parent if it's
enabled in a child.

- test_cgcore_no_internal_process_constraint_on_threads

Tests that there's no internal process constrain on threaded cgroups.
You can add threads/processes on a parent with a controller enabled.

- test_cgcore_parent_becomes_threaded

Tests that when a child becomes threaded the parent type becomes
domain threaded.

- test_cgcore_invalid_domain

In a situation like:

A (domain threaded) - B (threaded) - C (domain)

it tests that C can't be used until it is turned into a threaded cgroup.
The "cgroup.type" file will report "domain (invalid)" in these cases.
Operations which fail due to invalid topology use EOPNOTSUPP as the errno.

- test_cgcore_populated

In a situation like:

A(0) - B(0) - C(1)
\ D(0)

It tests that A, B and C's "populated" fields would be 1 while D's 0.
It tests that after the one process in C is moved to root, A,B and C's
"populated" fields would flip to "0" and file modified events will
be generated on the "cgroup.events" files of both cgroups.

Signed-off-by: Claudio Zumbo <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: [email protected]
Acked-by: Tejun Heo <[email protected]>
Reviewed-by: Roman Gushchin <[email protected]>
Signed-off-by: Shuah Khan (Samsung OSG) <[email protected]>

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selftests: cgroup: add memory controller self-tests

Cgroups are used for controlling the physical resource distribution
(memory, CPU, io, etc) and often are used as basic building blocks
for large d

selftests: cgroup: add memory controller self-tests

Cgroups are used for controlling the physical resource distribution
(memory, CPU, io, etc) and often are used as basic building blocks
for large distributed computing systems. Even small differences
in the actual behavior may lead to significant incidents.

The codebase is under the active development, which will unlikely
stop at any time soon. Also it's scattered over different kernel
subsystems, which makes regressions more probable.

Given that, the lack of any tests is crying.

This patch implements some basic tests for the memory controller,
as well as a minimal required framework. It doesn't pretend for a
very good coverage, but pretends to be a starting point.

Hopefully, any following significant changes will include corresponding
tests.

Tests for CPU and io controllers, as well as cgroup core
are next in the todo list.

Signed-off-by: Roman Gushchin <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Acked-by: Tejun Heo <[email protected]>
Signed-off-by: Shuah Khan (Samsung OSG) <[email protected]>

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