diff --git a/man/org.freedesktop.systemd1.xml b/man/org.freedesktop.systemd1.xml
index 1bdff502ca..878bd0d99d 100644
--- a/man/org.freedesktop.systemd1.xml
+++ b/man/org.freedesktop.systemd1.xml
@@ -2806,6 +2806,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -2814,6 +2818,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -3439,6 +3445,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
+
+
+
+
@@ -3447,6 +3457,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
+
+
@@ -4081,6 +4093,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
+
+
+
+
@@ -4089,6 +4105,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
+
+
@@ -4885,6 +4903,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -4893,6 +4915,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -5528,6 +5552,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
+
+
+
+
@@ -5536,6 +5564,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
+
+
@@ -6152,6 +6182,10 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
+
+
+
+
@@ -6160,6 +6194,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
+
+
@@ -6830,6 +6866,10 @@ node /org/freedesktop/systemd1/unit/home_2emount {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -6838,6 +6878,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -7401,6 +7443,10 @@ node /org/freedesktop/systemd1/unit/home_2emount {
+
+
+
+
@@ -7409,6 +7455,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
+
+
@@ -7939,6 +7987,10 @@ node /org/freedesktop/systemd1/unit/home_2emount {
+
+
+
+
@@ -7947,6 +7999,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
+
+
@@ -8740,6 +8794,10 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -8748,6 +8806,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -9297,6 +9357,10 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
+
+
+
+
@@ -9305,6 +9369,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
+
+
@@ -9821,6 +9887,10 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
+
+
+
+
@@ -9829,6 +9899,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
+
+
@@ -10481,6 +10553,10 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -10489,6 +10565,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -10664,6 +10742,10 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
+
+
+
+
@@ -10672,6 +10754,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
+
+
@@ -10852,6 +10936,10 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
+
+
+
+
@@ -10860,6 +10948,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
+
+
@@ -11066,6 +11156,10 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t MemoryAvailable = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveMemoryHigh = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t CPUUsageNSec = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly ay EffectiveCPUs = [...];
@@ -11074,6 +11168,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t TasksCurrent = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+ readonly t EffectiveTasksMax = ...;
+ @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressBytes = ...;
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly t IPIngressPackets = ...;
@@ -11269,6 +11365,10 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
+
+
+
+
@@ -11277,6 +11377,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
+
+
@@ -11487,6 +11589,10 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
+
+
+
+
@@ -11495,6 +11601,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
+
+
@@ -11888,6 +11996,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Socket Unit Objects
@@ -11919,6 +12030,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Mount Unit Objects
@@ -11948,6 +12062,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Swap Unit Objects
@@ -11977,6 +12094,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Slice Unit Objects
@@ -11997,6 +12117,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Scope Unit Objects
@@ -12018,6 +12141,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
MemorySwapCurrent,
MemorySwapPeak, and
MemoryZSwapCurrent were added in version 255.
+ EffectiveMemoryHigh,
+ EffectiveMemoryMax,
+ EffectiveTasksMax were added in version 256.
Job Objects
diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 2c5785cca9..2eb6797f4c 100644
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -409,7 +409,9 @@ CPUWeight=20 DisableControllers=cpu / \
system. If assigned the
special value infinity, no memory throttling is applied. This controls the
memory.high control group attribute. For details about this control group attribute, see
- Memory Interface Files.
+ Memory Interface Files.
+ The effective configuration is reported as EffectiveMemoryHigh=
+ (see also EffectiveMemoryMax=).
While StartupMemoryHigh= applies to the startup and shutdown phases of the system,
MemoryHigh= applies to normal runtime of the system, and if the former is not set also to
@@ -437,7 +439,9 @@ CPUWeight=20 DisableControllers=cpu / \
percentage value may be specified, which is taken relative to the installed physical memory on the system. If
assigned the special value infinity, no memory limit is applied. This controls the
memory.max control group attribute. For details about this control group attribute, see
- Memory Interface Files.
+ Memory Interface Files.
+ The effective configuration is reported as EffectiveMemoryMax= (the value is
+ the most stringent limit of the unit and parent slices and it is capped by physical memory).
While StartupMemoryMax= applies to the startup and shutdown phases of the system,
MemoryMax= applies to normal runtime of the system, and if the former is not set also to
@@ -563,7 +567,8 @@ CPUWeight=20 DisableControllers=cpu / \
limit is applied. This controls the pids.max control group attribute. For
details about this control group attribute, the
pids controller
- .
+ .
+ The effective configuration is reported as EffectiveTasksMax=.
The system default for this setting may be controlled with
DefaultTasksMax= in
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 311a4197aa..411f59d55d 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -4555,6 +4555,57 @@ int unit_get_ip_accounting(
return r;
}
+static uint64_t unit_get_effective_limit_one(Unit *u, CGroupLimitType type) {
+ CGroupContext *cc;
+
+ assert(u);
+ assert(UNIT_HAS_CGROUP_CONTEXT(u));
+
+ if (unit_has_name(u, SPECIAL_ROOT_SLICE))
+ switch (type) {
+ case CGROUP_LIMIT_MEMORY_MAX:
+ case CGROUP_LIMIT_MEMORY_HIGH:
+ return physical_memory();
+ case CGROUP_LIMIT_TASKS_MAX:
+ return system_tasks_max();
+ default:
+ assert_not_reached();
+ }
+
+ cc = unit_get_cgroup_context(u);
+ switch (type) {
+ /* Note: on legacy/hybrid hierarchies memory_max stays CGROUP_LIMIT_MAX unless configured
+ * explicitly. Effective value of MemoryLimit= (cgroup v1) is not implemented. */
+ case CGROUP_LIMIT_MEMORY_MAX:
+ return cc->memory_max;
+ case CGROUP_LIMIT_MEMORY_HIGH:
+ return cc->memory_high;
+ case CGROUP_LIMIT_TASKS_MAX:
+ return cgroup_tasks_max_resolve(&cc->tasks_max);
+ default:
+ assert_not_reached();
+ }
+}
+
+int unit_get_effective_limit(Unit *u, CGroupLimitType type, uint64_t *ret) {
+ uint64_t infimum;
+
+ assert(u);
+ assert(ret);
+ assert(type >= 0);
+ assert(type < _CGROUP_LIMIT_TYPE_MAX);
+
+ if (!UNIT_HAS_CGROUP_CONTEXT(u))
+ return -EINVAL;
+
+ infimum = unit_get_effective_limit_one(u, type);
+ for (Unit *slice = UNIT_GET_SLICE(u); slice; slice = UNIT_GET_SLICE(slice))
+ infimum = MIN(infimum, unit_get_effective_limit_one(slice, type));
+
+ *ret = infimum;
+ return 0;
+}
+
static int unit_get_io_accounting_raw(Unit *u, uint64_t ret[static _CGROUP_IO_ACCOUNTING_METRIC_MAX]) {
static const char *const field_names[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = {
[CGROUP_IO_READ_BYTES] = "rbytes=",
@@ -4975,3 +5026,11 @@ static const char* const cgroup_memory_accounting_metric_table[_CGROUP_MEMORY_AC
};
DEFINE_STRING_TABLE_LOOKUP(cgroup_memory_accounting_metric, CGroupMemoryAccountingMetric);
+
+static const char *const cgroup_limit_type_table[_CGROUP_LIMIT_TYPE_MAX] = {
+ [CGROUP_LIMIT_MEMORY_MAX] = "EffectiveMemoryMax",
+ [CGROUP_LIMIT_MEMORY_HIGH] = "EffectiveMemoryHigh",
+ [CGROUP_LIMIT_TASKS_MAX] = "EffectiveTasksMax",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(cgroup_limit_type, CGroupLimitType);
diff --git a/src/core/cgroup.h b/src/core/cgroup.h
index ecd6759983..1d6938aa18 100644
--- a/src/core/cgroup.h
+++ b/src/core/cgroup.h
@@ -277,6 +277,15 @@ typedef enum CGroupMemoryAccountingMetric {
_CGROUP_MEMORY_ACCOUNTING_METRIC_INVALID = -EINVAL,
} CGroupMemoryAccountingMetric;
+/* Used for limits whose value sets have infimum */
+typedef enum CGroupLimitType {
+ CGROUP_LIMIT_MEMORY_MAX,
+ CGROUP_LIMIT_MEMORY_HIGH,
+ CGROUP_LIMIT_TASKS_MAX,
+ _CGROUP_LIMIT_TYPE_MAX,
+ _CGROUP_LIMIT_INVALID = -EINVAL,
+} CGroupLimitType;
+
typedef struct Unit Unit;
typedef struct Manager Manager;
typedef enum ManagerState ManagerState;
@@ -388,6 +397,7 @@ int unit_get_tasks_current(Unit *u, uint64_t *ret);
int unit_get_cpu_usage(Unit *u, nsec_t *ret);
int unit_get_io_accounting(Unit *u, CGroupIOAccountingMetric metric, bool allow_cache, uint64_t *ret);
int unit_get_ip_accounting(Unit *u, CGroupIPAccountingMetric metric, uint64_t *ret);
+int unit_get_effective_limit(Unit *u, CGroupLimitType type, uint64_t *ret);
int unit_reset_cpu_accounting(Unit *u);
void unit_reset_memory_accounting_last(Unit *u);
@@ -439,5 +449,8 @@ CGroupIPAccountingMetric cgroup_ip_accounting_metric_from_string(const char *s)
const char* cgroup_io_accounting_metric_to_string(CGroupIOAccountingMetric m) _const_;
CGroupIOAccountingMetric cgroup_io_accounting_metric_from_string(const char *s) _pure_;
+const char* cgroup_limit_type_to_string(CGroupLimitType m) _const_;
+CGroupLimitType cgroup_limit_type_from_string(const char *s) _pure_;
+
const char* cgroup_memory_accounting_metric_to_string(CGroupMemoryAccountingMetric m) _const_;
CGroupMemoryAccountingMetric cgroup_memory_accounting_metric_from_string(const char *s) _pure_;
diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c
index 8b4983dcb5..3aeb85e452 100644
--- a/src/core/dbus-unit.c
+++ b/src/core/dbus-unit.c
@@ -1426,6 +1426,28 @@ static int property_get_io_counter(
return sd_bus_message_append(reply, "t", value);
}
+static int property_get_effective_limit(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ uint64_t value = CGROUP_LIMIT_MAX;
+ Unit *u = ASSERT_PTR(userdata);
+ ssize_t type;
+
+ assert(bus);
+ assert(reply);
+ assert(property);
+
+ assert_se((type = cgroup_limit_type_from_string(property)) >= 0);
+ (void) unit_get_effective_limit(u, type, &value);
+ return sd_bus_message_append(reply, "t", value);
+}
+
int bus_unit_method_attach_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
_cleanup_set_free_ Set *pids = NULL;
@@ -1547,10 +1569,13 @@ const sd_bus_vtable bus_unit_cgroup_vtable[] = {
SD_BUS_PROPERTY("MemorySwapPeak", "t", property_get_memory_accounting, 0, 0),
SD_BUS_PROPERTY("MemoryZSwapCurrent", "t", property_get_memory_accounting, 0, 0),
SD_BUS_PROPERTY("MemoryAvailable", "t", property_get_available_memory, 0, 0),
+ SD_BUS_PROPERTY("EffectiveMemoryMax", "t", property_get_effective_limit, 0, 0),
+ SD_BUS_PROPERTY("EffectiveMemoryHigh", "t", property_get_effective_limit, 0, 0),
SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
SD_BUS_PROPERTY("EffectiveCPUs", "ay", property_get_cpuset_cpus, 0, 0),
SD_BUS_PROPERTY("EffectiveMemoryNodes", "ay", property_get_cpuset_mems, 0, 0),
SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0),
+ SD_BUS_PROPERTY("EffectiveTasksMax", "t", property_get_effective_limit, 0, 0),
SD_BUS_PROPERTY("IPIngressBytes", "t", property_get_ip_counter, 0, 0),
SD_BUS_PROPERTY("IPIngressPackets", "t", property_get_ip_counter, 0, 0),
SD_BUS_PROPERTY("IPEgressBytes", "t", property_get_ip_counter, 0, 0),
diff --git a/src/shared/bus-print-properties.c b/src/shared/bus-print-properties.c
index 6704e1ef3d..99b1cc7c70 100644
--- a/src/shared/bus-print-properties.c
+++ b/src/shared/bus-print-properties.c
@@ -164,9 +164,11 @@ static int bus_print_property(const char *name, const char *expected_value, sd_b
bus_print_property_value(name, expected_value, flags, "[not set]");
- else if ((ENDSWITH_SET(name, "MemoryLow", "MemoryMin", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryZSwapMax", "MemoryLimit") &&
+ else if ((ENDSWITH_SET(name, "MemoryLow", "MemoryMin",
+ "MemoryHigh", "MemoryMax",
+ "MemorySwapMax", "MemoryZSwapMax", "MemoryLimit") &&
u == CGROUP_LIMIT_MAX) ||
- (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == UINT64_MAX) ||
+ (endswith(name, "TasksMax") && u == UINT64_MAX) ||
(startswith(name, "Limit") && u == UINT64_MAX) ||
(startswith(name, "DefaultLimit") && u == UINT64_MAX))
diff --git a/test/units/testsuite-05.effective-limit.sh b/test/units/testsuite-05.effective-limit.sh
new file mode 100755
index 0000000000..3ff8e83140
--- /dev/null
+++ b/test/units/testsuite-05.effective-limit.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
+
+pre=test05
+cat >/run/systemd/system/"$pre"alpha.slice </run/systemd/system/"$pre"alpha-beta.slice </run/systemd/system/"$pre"alpha-beta-gamma.slice <$P/rlimits.conf <$P/rlimits.conf < '$2'" >&2
+ exit 1
+ fi
+)}
+
assert_in() {(
set +ex