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/linux/tools/testing/selftests/cgroup/
H A Dtest_freezer.c27 static int cg_check_frozen(const char *cgroup, bool frozen) in cg_check_frozen() argument
30 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 1") != 0) { in cg_check_frozen()
31 debug("Cgroup %s isn't frozen\n", cgroup); in cg_check_frozen()
38 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 0") != 0) { in cg_check_frozen()
39 debug("Cgroup %s is frozen\n", cgroup); in cg_check_frozen()
50 static int cg_freeze_nowait(const char *cgroup, bool freeze) in cg_freeze_nowait() argument
52 return cg_write(cgroup, "cgroup.freeze", freeze ? "1" : "0"); in cg_freeze_nowait()
59 static int cg_enter_and_wait_for_frozen(const char *cgroup, int pid, in cg_enter_and_wait_for_frozen() argument
65 fd = cg_prepare_for_wait(cgroup); in cg_enter_and_wait_for_frozen()
69 ret = cg_enter(cgroup, pid); in cg_enter_and_wait_for_frozen()
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H A Dtest_kill.c21 static int cg_kill_wait(const char *cgroup) in cg_kill_wait() argument
25 fd = cg_prepare_for_wait(cgroup); in cg_kill_wait()
29 ret = cg_write(cgroup, "cgroup.kill", "1"); in cg_kill_wait()
46 static int child_fn(const char *cgroup, void *arg) in child_fn() argument
60 char *cgroup = NULL; in test_cgkill_simple() local
63 cgroup = cg_name(root, "cg_test_simple"); in test_cgkill_simple()
64 if (!cgroup) in test_cgkill_simple()
67 if (cg_create(cgroup)) in test_cgkill_simple()
71 pids[i] = cg_run_nowait(cgroup, child_fn, NULL); in test_cgkill_simple()
73 if (cg_wait_for_proc_count(cgroup, 100)) in test_cgkill_simple()
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H A Dcgroup_util.h
H A Dcgroup_util.c
/linux/tools/testing/selftests/cgroup/lib/
H A Dcgroup_util.c77 char *cg_control(const char *cgroup, const char *control) in cg_control() argument
79 size_t len = strlen(cgroup) + strlen(control) + 2; in cg_control()
82 snprintf(ret, len, "%s/%s", cgroup, control); in cg_control()
88 int cg_read(const char *cgroup, const char *control, char *buf, size_t len) in cg_read() argument
93 snprintf(path, sizeof(path), "%s/%s", cgroup, control); in cg_read()
99 int cg_read_strcmp(const char *cgroup, const char *control, in cg_read_strcmp() argument
117 if (cg_read(cgroup, control, buf, size)) { in cg_read_strcmp()
127 int cg_read_strcmp_wait(const char *cgroup, const char *control, in cg_read_strcmp_wait() argument
133 ret = cg_read_strcmp(cgroup, control, expected); in cg_read_strcmp_wait()
142 int cg_read_strstr(const char *cgroup, const char *control, const char *needle) in cg_read_strstr() argument
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/linux/tools/testing/selftests/cgroup/lib/include/
H A Dcgroup_util.h57 extern char *cg_control(const char *cgroup, const char *control);
58 extern int cg_create(const char *cgroup);
59 extern int cg_destroy(const char *cgroup);
60 extern int cg_read(const char *cgroup, const char *control,
62 extern int cg_read_strcmp(const char *cgroup, const char *control,
64 extern int cg_read_strcmp_wait(const char *cgroup, const char *control,
66 extern int cg_read_strstr(const char *cgroup, const char *control,
68 extern long cg_read_long(const char *cgroup, const char *control);
70 long cg_read_key_long(const char *cgroup, const char *control, const char *key);
71 long cg_read_key_long_poll(const char *cgroup, const char *control,
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/linux/tools/testing/selftests/bpf/progs/
H A Dcgrp_kfunc_failure.c20 static struct __cgrps_kfunc_map_value *insert_lookup_cgrp(struct cgroup *cgrp) in insert_lookup_cgrp()
33 int BPF_PROG(cgrp_kfunc_acquire_untrusted, struct cgroup *cgrp, const char *path) in BPF_PROG()
35 struct cgroup *acquired; in BPF_PROG()
52 int BPF_PROG(cgrp_kfunc_acquire_no_null_check, struct cgroup *cgrp, const char *path) in BPF_PROG()
54 struct cgroup *acquired; in BPF_PROG()
68 int BPF_PROG(cgrp_kfunc_acquire_fp, struct cgroup *cgrp, const char *path) in BPF_PROG()
70 struct cgroup *acquired, *stack_cgrp = (struct cgroup *)&path; in BPF_PROG()
73 acquired = bpf_cgroup_acquire((struct cgroup *)&stack_cgrp); in BPF_PROG()
82 int BPF_PROG(cgrp_kfunc_acquire_unsafe_kretprobe, struct cgroup *cgrp) in BPF_PROG()
84 struct cgroup *acquired; in BPF_PROG()
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H A Dcgroup_read_xattr.c15 static __always_inline void read_xattr(struct cgroup *cgroup) in read_xattr() argument
20 bpf_cgroup_read_xattr(cgroup, "user.bpf_test", in read_xattr()
29 struct cgroup *cgrp; in BPF_PROG()
45 struct cgroup *cgrp; in BPF_PROG()
62 struct cgroup *cgrp; in BPF_PROG()
69 read_xattr(css->cgroup); in BPF_PROG()
81 struct cgroup *cgrp; in BPF_PROG()
88 read_xattr(css->cgroup); in BPF_PROG()
100 struct cgroup *cgr in BPF_PROG()
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H A Dcgrp_kfunc_common.h13 struct cgroup __kptr * cgrp;
23 struct cgroup *bpf_cgroup_acquire(struct cgroup *p) __ksym;
24 void bpf_cgroup_release(struct cgroup *p) __ksym;
25 struct cgroup *bpf_cgroup_ancestor(struct cgroup *cgrp, int level) __ksym;
26 struct cgroup *bpf_cgroup_from_id(u64 cgid) __ksym;
30 static inline struct __cgrps_kfunc_map_value *cgrps_kfunc_map_value_lookup(struct cgroup *cgrp) in cgrps_kfunc_map_value_lookup()
42 static inline int cgrps_kfunc_map_insert(struct cgroup *cgrp) in cgrps_kfunc_map_insert()
46 struct cgroup *acquired, *old; in cgrps_kfunc_map_insert()
H A Dcgrp_kfunc_success.c17 * TP_PROTO(struct cgroup *cgrp, const char *path),
33 int BPF_PROG(test_cgrp_acquire_release_argument, struct cgroup *cgrp, const char *path) in BPF_PROG()
35 struct cgroup *acquired; in BPF_PROG()
50 int BPF_PROG(test_cgrp_acquire_leave_in_map, struct cgroup *cgrp, const char *path) in BPF_PROG()
65 int BPF_PROG(test_cgrp_xchg_release, struct cgroup *cgrp, const char *path) in BPF_PROG()
67 struct cgroup *kptr, *cg; in BPF_PROG()
108 int BPF_PROG(test_cgrp_get_release, struct cgroup *cgrp, const char *path) in BPF_PROG()
110 struct cgroup *kptr; in BPF_PROG()
139 int BPF_PROG(test_cgrp_get_ancestors, struct cgroup *cgrp, const char *path) in BPF_PROG()
141 struct cgroup *sel in BPF_PROG()
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H A Diters_css_task.c13 struct cgroup *bpf_cgroup_acquire(struct cgroup *p) __ksym;
14 struct cgroup *bpf_cgroup_from_id(u64 cgid) __ksym;
15 void bpf_cgroup_release(struct cgroup *p) __ksym;
28 struct cgroup *cgrp; in BPF_PROG()
50 static inline u64 cgroup_id(struct cgroup *cgrp) in cgroup_id()
59 struct cgroup *cgrp = ctx->cgroup; in cgroup_id_printer()
89 struct cgroup *cgrp = bpf_cgroup_from_id(cgrp_id); in BPF_PROG()
/linux/tools/perf/util/
H A Dcgroup.c4 #include "cgroup.h"
24 /* used to match cgroup name with patterns */
46 fprintf(stderr, "no access to cgroup %s\n", path); in open_cgroup()
67 int read_cgroup_id(struct cgroup *cgrp) in read_cgroup_id()
102 static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str) in evlist__find_cgroup()
118 struct cgroup *cgroup__new(const char *name, bool do_open) in cgroup__new()
120 struct cgroup *cgroup = zalloc(sizeof(*cgroup)); in cgroup__new() local
122 if (cgroup ! in cgroup__new()
149 struct cgroup *cgroup = evlist__find_cgroup(evlist, name); evlist__findnew_cgroup() local
180 cgroup__delete(struct cgroup * cgroup) cgroup__delete() argument
195 cgroup__get(struct cgroup * cgroup) cgroup__get() argument
202 evsel__set_default_cgroup(struct evsel * evsel,struct cgroup * cgroup) evsel__set_default_cgroup() argument
208 evlist__set_default_cgroup(struct evlist * evlist,struct cgroup * cgroup) evlist__set_default_cgroup() argument
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H A Dcgroup.h12 struct cgroup { struct
23 struct cgroup *cgroup__get(struct cgroup *cgroup); argument
24 void cgroup__put(struct cgroup *cgroup);
29 struct cgroup *cgroup__new(const char *name, bool do_open);
30 struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
33 void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
37 struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
39 struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
40 struct cgroup *__cgroup__find(struct rb_root *root, uint64_t id);
45 int read_cgroup_id(struct cgroup *cgrp);
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/linux/tools/bpf/bpftool/Documentation/
H A Dbpftool-cgroup.rst4 bpftool-cgroup
17 **bpftool** [*OPTIONS*] **cgroup** *COMMAND*
27 | **bpftool** **cgroup** { **show** | **list** } *CGROUP* [**effective**]
28 | **bpftool** **cgroup tree** [*CGROUP_ROOT*] [**effective**]
29 | **bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
30 | **bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
31 | **bpftool** **cgroup help**
52 bpftool cgroup { show | list } *CGROUP* [effective]
53 List all programs attached to the cgroup *CGROUP*.
59 for events within a cgroup. This includes inherited along with attached
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/linux/Documentation/admin-guide/cgroup-v1/
H A Dcgroups.rst6 Documentation/admin-guide/cgroup-v1/cpusets.rst
50 A *cgroup* associates a set of tasks with a set of parameters for one
56 schedules a resource or applies per-cgroup limits, but it may be
63 state attached to each cgroup in the hierarchy. Each hierarchy has
64 an instance of the cgroup virtual filesystem associated with it.
70 instance of the cgroup virtual file system, specify and query to
71 which cgroup a task is assigned, and list the task PIDs assigned to
72 a cgroup. Those creations and assignments only affect the hierarchy
73 associated with that instance of the cgroup file system.
77 cgroup support to provide new attributes for cgroups, such as
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H A Dpids.rst8 The process number controller is used to allow a cgroup hierarchy to stop any
13 preventable in the scope of a cgroup hierarchy by allowing resource limiting of
14 the number of tasks in a cgroup.
20 pids.max (this is not available in the root cgroup for obvious reasons). The
21 number of processes currently in the cgroup is given by pids.current.
23 Organisational operations are not blocked by cgroup policies, so it is possible
25 be smaller than pids.current, or attaching enough processes to the cgroup such
26 that pids.current > pids.max. However, it is not possible to violate a cgroup
28 creation of a new process would cause a cgroup policy to be violated.
30 To set a cgroup to have no limit, set pids.max to "max". This is the default for
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H A Drdma.rst23 cgroup.
30 in other cgroup or kernel space ULPs may not even get chance to allocate any
40 RDMA cgroup allows limit configuration of resources. Rdma cgroup maintains
41 resource accounting per cgroup, per device using resource pool structure.
43 by rdma cgroup, which can be extended later if required.
45 This resource pool object is linked to the cgroup css. Typically there
46 are 0 to 4 resource pool instances per cgroup, per device in most use cases.
48 single cgroup may not be handled optimally, however there is no
53 always owned by the creator cgroup css. This allows process migration from one
54 to other cgroup without major complexity of transferring resource ownership;
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H A Dnet_cls.rst2 Network classifier cgroup
5 The Network classifier cgroup provides an interface to
23 mkdir /sys/fs/cgroup/net_cls
24 mount -t cgroup -onet_cls net_cls /sys/fs/cgroup/net_cls
25 mkdir /sys/fs/cgroup/net_cls/0
26 echo 0x100001 > /sys/fs/cgroup/net_cls/0/net_cls.classid
30 cat /sys/fs/cgroup/net_cls/0/net_cls.classid
40 tc filter add dev eth0 parent 10: protocol ip prio 10 handle 1: cgroup
44 iptables -A OUTPUT -m cgroup ! --cgroup 0x100001 -j DROP
H A Dcpuacct.rst12 Accounting groups can be created by first mounting the cgroup filesystem::
14 # mount -t cgroup -ocpuacct none /sys/fs/cgroup
17 visible at /sys/fs/cgroup. At bootup, this group includes all the tasks in
18 the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup.
19 /sys/fs/cgroup/cpuacct.usage gives the CPU time (in nanoseconds) obtained
23 New accounting groups can be created under the parent group /sys/fs/cgroup::
25 # cd /sys/fs/cgroup
32 /sys/fs/cgroup/cpuacct.usage also.
35 CPU time obtained by the cgroup into user and system times. Currently
38 user: Time spent by tasks of the cgroup in user mode.
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H A Dnet_prio.rst2 Network priority cgroup
5 The Network priority cgroup provides an interface to allow an administrator to
16 This cgroup allows an administrator to assign a process to a group which defines
18 be created by first mounting the cgroup filesystem::
20 # mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
23 becomes visible at '/sys/fs/cgroup/net_prio'. This group includes all tasks in
24 the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
26 Each net_prio cgroup contains two files that are subsystem specific
31 cgroup.
43 iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
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/linux/Documentation/admin-guide/
H A Dcgroup-v2.rst11 conventions of cgroup v2. It describes all userland-visible aspects
12 of cgroup including core and specific controller behaviors. All
14 v1 is available under :ref:`Documentation/admin-guide/cgroup-v1/index.rst <cgroup-v1>`.
23 1-2. What is cgroup?
82 5-N-1. CPU controller root cgroup process behaviour
83 5-N-2. IO controller root cgroup process behaviour
107 "cgroup" stands for "control group" and is never capitalized. The
109 qualifier as in "cgroup controllers". When explicitly referring to
113 What is cgroup?
116 cgroup is a mechanism to organize processes hierarchically and
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/linux/kernel/cgroup/
H A Dcgroup.c262 static int cgroup_apply_control(struct cgroup *cgrp);
263 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
266 static int cgroup_destroy_locked(struct cgroup *cgrp);
267 static void cgroup_finish_destroy(struct cgroup *cgrp);
270 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
274 struct cgroup *cgrp, struct cftype cfts[],
343 bool cgroup_on_dfl(const struct cgroup *cgrp) in cgroup_on_dfl()
379 static bool cgroup_has_tasks(struct cgroup *cgrp) in cgroup_has_tasks()
384 static bool cgroup_is_threaded(struct cgroup *cgrp) in cgroup_is_threaded()
390 static bool cgroup_is_mixable(struct cgroup *cgrp) in cgroup_is_mixable()
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H A Dfreezer.c15 static bool cgroup_update_frozen_flag(struct cgroup *cgrp, bool frozen) in cgroup_update_frozen_flag()
36 static void cgroup_propagate_frozen(struct cgroup *cgrp, bool frozen) in cgroup_propagate_frozen()
66 void cgroup_update_frozen(struct cgroup *cgrp) in cgroup_update_frozen()
86 static void cgroup_inc_frozen_cnt(struct cgroup *cgrp) in cgroup_inc_frozen_cnt()
94 static void cgroup_dec_frozen_cnt(struct cgroup *cgrp) in cgroup_dec_frozen_cnt()
106 struct cgroup *cgrp; in cgroup_enter_frozen()
130 struct cgroup *cgrp; in cgroup_leave_frozen()
174 static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze, u64 ts_nsec) in cgroup_do_freeze()
226 struct cgroup *src, struct cgroup *dst) in cgroup_freezer_migrate_task()
263 void cgroup_freeze(struct cgroup *cgrp, bool freeze) in cgroup_freeze()
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/linux/tools/perf/tests/shell/
H A Dstat_bpf_counters_cgrp.sh15 if ! perf stat -a --bpf-counters --for-each-cgroup / true > /dev/null 2>&1; then
18 perf --no-pager stat -a --bpf-counters --for-each-cgroup / true || true
28 if [ -d /sys/fs/cgroup/system.slice ] && [ -d /sys/fs/cgroup/user.slice ]; then
34 find_cgroups_self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3)
37 find_cgroups_self_cgrp=$(grep ^0: /proc/self/cgroup | cut -d: -f3)
51 …check_system_wide_counted_output=$(perf stat -a --bpf-counters --for-each-cgroup ${test_cgroups} -…
/linux/tools/testing/selftests/mm/
H A Dcharge_reserved_hugetlb.sh26 if [[ "$1" == "-cgroup-v2" ]]; then
41 echo "+hugetlb" >$cgroup_path/cgroup.subtree_control
43 cgroup_path=$(mount -t cgroup | grep ",hugetlb" | awk '{print $3}')
46 mount -t cgroup memory,hugetlb $cgroup_path
54 echo $$ >$cgroup_path/cgroup.procs
105 echo writing cgroup limit: "$cgroup_limit"
144 local cgroup="$1"
145 local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
151 local cgroup="$1"
153 local path="$cgroup_path/$cgroup/hugetl
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