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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
- Per-cpu cpu usage stats are now tracked
This currently isn't printed out in the cgroupfs interface and can
only be accessed through e.g. BPF. Should decide on a not-too-ugly
way to show per-cpu stats in cgroupfs
- cpuset received some cleanups and prepatory patches for the pending
cpus.exclusive patchset which will allow cpuset partitions to be
created below non-partition parents, which should ease the management
of partition cpusets
- A lot of code and documentation cleanup patches
- tools/testing/selftests/cgroup/test_cpuset.c added
* tag 'cgroup-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (32 commits)
cgroup: Avoid -Wstringop-overflow warnings
cgroup:namespace: Remove unused cgroup_namespaces_init()
cgroup/rstat: Record the cumulative per-cpu time of cgroup and its descendants
cgroup: clean up if condition in cgroup_pidlist_start()
cgroup: fix obsolete function name in cgroup_destroy_locked()
Documentation: cgroup-v2.rst: Correct number of stats entries
cgroup: fix obsolete function name above css_free_rwork_fn()
cgroup/cpuset: fix kernel-doc
cgroup: clean up printk()
cgroup: fix obsolete comment above cgroup_create()
docs: cgroup-v1: fix typo
docs: cgroup-v1: correct the term of Page Cache organization in inode
cgroup/misc: Store atomic64_t reads to u64
cgroup/misc: Change counters to be explicit 64bit types
cgroup/misc: update struct members descriptions
cgroup: remove cgrp->kn check in css_populate_dir()
cgroup: fix obsolete function name
cgroup: use cached local variable parent in for loop
cgroup: remove obsolete comment above struct cgroupstats
cgroup: put cgroup_tryget_css() inside CONFIG_CGROUP_SCHED
...
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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/20230621153548.428093-1-cerasuolodomenico@gmail.com
Link: https://lkml.kernel.org/r/20230621153548.428093-2-cerasuolodomenico@gmail.com
Signed-off-by: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Zefan Li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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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 <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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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 <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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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 <void@manifault.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Test that the new cgroup.kill feature works as intended.
Link: https://lore.kernel.org/r/20210503143922.3093755-5-brauner@kernel.org
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: cgroups@vger.kernel.org
Acked-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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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 <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Link: http://lkml.kernel.org/r/20200623174037.3951353-19-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add SPDX License Identifier to all .gitignore files.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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 <guro@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: kernel-team@fb.com
Cc: linux-kselftest@vger.kernel.org
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Update .gitignore file.
Signed-off-by: Lei Yang <Lei.Yang@windriver.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
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Add the executable 'test_memcontrol' to a .gitignore file.
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
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