Merge pull request #29879 from Flowdalic/cgroup-memory-peak

cgroup: add support for memory.peak

NEWS

@@ -130,6 +130,9 @@ CHANGES WITH 255 in spe:
           machinectl bind and mount-image verbs will now cause the new mount to
           replace the old mount (if any), instead of overmounting it.
 
+        * Units now have a MemoryPeak property, which contains the value of
+          cgroup v2's memory.peak property.
+
         TPM2 Support + Disk Encryption & Authentication:
 
         * systemd-cryptenroll now allows specifying a PCR bank and explicit hash
@@ -433,7 +436,7 @@ CHANGES WITH 255 in spe:
         * systemd-sysupdate now accepts directories in the MatchPattern= option.
 
         * systemd-run will now output the invocation ID of the launched
-          transient unit.
+          transient unit and its peak memory usage.
 
         * systemd-analyze, systemd-tmpfiles, systemd-sysusers, systemd-sysctl,
           and systemd-binfmt gained a new --tldr option that can be used instead

man/org.freedesktop.systemd1.xml

@@ -2776,6 +2776,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -3403,6 +3405,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -4035,6 +4039,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -4831,6 +4837,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -5468,6 +5476,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -6082,6 +6092,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -6752,6 +6764,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -7317,6 +7331,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -7845,6 +7861,8 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -8638,6 +8656,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -9189,6 +9209,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -9703,6 +9725,8 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -10355,6 +10379,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -10532,6 +10558,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -10710,6 +10738,8 @@ node /org/freedesktop/systemd1/unit/system_2eslice {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -10916,6 +10946,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryCurrent = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly t MemoryPeak = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t MemoryAvailable = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
       readonly t CPUUsageNSec = ...;
@@ -11113,6 +11145,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
 
     <!--property MemoryCurrent is not documented!-->
 
+    <!--property MemoryPeak is not documented!-->
+
     <!--property CPUUsageNSec is not documented!-->
 
     <!--property EffectiveCPUs is not documented!-->
@@ -11321,6 +11355,8 @@ node /org/freedesktop/systemd1/unit/session_2d1_2escope {
 
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryCurrent"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="MemoryPeak"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="MemoryAvailable"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CPUUsageNSec"/>
@@ -11716,8 +11752,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>MountImagePolicy</varname>, and
       <varname>ExtensionImagePolicy</varname> were added in version 254.</para>
       <para><varname>NFTSet</varname>,
-      <varname>SetLoginEnvironment</varname> and
+      <varname>SetLoginEnvironment</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Socket Unit Objects</title>
@@ -11743,8 +11780,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <para><varname>PollLimitIntervalUSec</varname>,
       <varname>PollLimitBurst</varname>,
       <varname>NFTSet</varname>,
-      <varname>SetLoginEnvironment</varname> and
+      <varname>SetLoginEnvironment</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Mount Unit Objects</title>
@@ -11768,8 +11806,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>MountImagePolicy</varname>, and
       <varname>ExtensionImagePolicy</varname> were added in version 254.</para>
       <para><varname>NFTSet</varname>,
-      <varname>SetLoginEnvironment</varname> and
+      <varname>SetLoginEnvironment</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Swap Unit Objects</title>
@@ -11793,8 +11832,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>MountImagePolicy</varname>, and
       <varname>ExtensionImagePolicy</varname> were added in version 254.</para>
       <para><varname>NFTSet</varname>,
-      <varname>SetLoginEnvironment</varname> and
+      <varname>SetLoginEnvironment</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Slice Unit Objects</title>
@@ -11809,8 +11849,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>StartupMemoryZSwapMax</varname>,
       <varname>MemoryPressureWatch</varname>, and
       <varname>MemoryPressureThresholdUSec</varname> were added in version 254.</para>
-      <para><varname>NFTSet</varname> and
+      <para><varname>NFTSet</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Scope Unit Objects</title>
@@ -11826,8 +11867,9 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>StartupMemoryZSwapMax</varname>,
       <varname>MemoryPressureWatch</varname>, and
       <varname>MemoryPressureThresholdUSec</varname> were added in version 254.</para>
-      <para><varname>NFTSet</varname> and
+      <para><varname>NFTSet</varname>,
-      <varname>CoredumpReceive</varname> were added in version 255.</para>
+      <varname>CoredumpReceive</varname>, and
+      <varname>MemoryPeak</varname> were added in version 255.</para>
     </refsect2>
     <refsect2>
       <title>Job Objects</title>

src/core/cgroup.c

@@ -4040,6 +4040,60 @@ int unit_get_memory_current(Unit *u, uint64_t *ret) {
         return cg_get_attribute_as_uint64("memory", u->cgroup_path, r > 0 ? "memory.current" : "memory.usage_in_bytes", ret);
 }
 
+static int unit_get_memory_peak_raw(Unit *u, uint64_t *ret) {
+        int r;
+
+        assert(u);
+        assert(ret);
+
+        if (!u->cgroup_path)
+                return -ENODATA;
+
+        /* The root cgroup doesn't expose this information. */
+        if (unit_has_host_root_cgroup(u))
+                return -ENODATA;
+
+        if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0)
+                return -ENODATA;
+
+        r = cg_all_unified();
+        if (r < 0)
+                return r;
+        if (!r)
+                return -ENODATA;
+
+        return cg_get_attribute_as_uint64("memory", u->cgroup_path, "memory.peak", ret);
+}
+
+int unit_get_memory_peak(Unit *u, uint64_t *ret) {
+        uint64_t bytes;
+        int r;
+
+        assert(u);
+        assert(ret);
+
+        if (!UNIT_CGROUP_BOOL(u, memory_accounting))
+                return -ENODATA;
+
+        r = unit_get_memory_peak_raw(u, &bytes);
+        if (r == -ENODATA && u->memory_peak_last != UINT64_MAX) {
+                /* If we can't get the memory peak anymore (because the cgroup was already removed, for example),
+                 * use our cached value. */
+
+                if (ret)
+                        *ret = u->memory_peak_last;
+                return 0;
+        }
+        if (r < 0)
+                return r;
+
+        u->memory_peak_last = bytes;
+        if (ret)
+                *ret = bytes;
+
+        return 0;
+}
+
 int unit_get_tasks_current(Unit *u, uint64_t *ret) {
         assert(u);
         assert(ret);

src/core/cgroup.h

@@ -353,6 +353,7 @@ int unit_watch_all_pids(Unit *u);
 int unit_synthesize_cgroup_empty_event(Unit *u);
 
 int unit_get_memory_current(Unit *u, uint64_t *ret);
+int unit_get_memory_peak(Unit *u, uint64_t *ret);
 int unit_get_memory_available(Unit *u, uint64_t *ret);
 int unit_get_tasks_current(Unit *u, uint64_t *ret);
 int unit_get_cpu_usage(Unit *u, nsec_t *ret);

src/core/dbus-unit.c

@@ -1080,6 +1080,29 @@ static int property_get_current_memory(
         return sd_bus_message_append(reply, "t", sz);
 }
 
+static int property_get_peak_memory(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        uint64_t sz = UINT64_MAX;
+        Unit *u = ASSERT_PTR(userdata);
+        int r;
+
+        assert(bus);
+        assert(reply);
+
+        r = unit_get_memory_peak(u, &sz);
+        if (r < 0 && r != -ENODATA)
+                log_unit_warning_errno(u, r, "Failed to get memory.peak attribute: %m");
+
+        return sd_bus_message_append(reply, "t", sz);
+}
+
 static int property_get_available_memory(
                 sd_bus *bus,
                 const char *path,
@@ -1536,6 +1559,7 @@ const sd_bus_vtable bus_unit_cgroup_vtable[] = {
         SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0),
         SD_BUS_PROPERTY("ControlGroupId", "t", NULL, offsetof(Unit, cgroup_id), 0),
         SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0),
+        SD_BUS_PROPERTY("MemoryPeak", "t", property_get_peak_memory, 0, 0),
         SD_BUS_PROPERTY("MemoryAvailable", "t", property_get_available_memory, 0, 0),
         SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
         SD_BUS_PROPERTY("EffectiveCPUs", "ay", property_get_cpuset_cpus, 0, 0),

src/core/unit.c

@@ -114,6 +114,7 @@ Unit* unit_new(Manager *m, size_t size) {
         u->ref_uid = UID_INVALID;
         u->ref_gid = GID_INVALID;
         u->cpu_usage_last = NSEC_INFINITY;
+        u->memory_peak_last = UINT64_MAX;
         u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL;
         u->failure_action_exit_status = u->success_action_exit_status = -1;
 
@@ -2325,6 +2326,7 @@ static int unit_log_resources(Unit *u) {
         size_t n_message_parts = 0, n_iovec = 0;
         char* message_parts[1 + 2 + 2 + 1], *t;
         nsec_t nsec = NSEC_INFINITY;
+        uint64_t memory_peak = UINT64_MAX;
         int r;
         const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = {
                 [CGROUP_IP_INGRESS_BYTES]   = "IP_METRIC_INGRESS_BYTES",
@@ -2368,6 +2370,24 @@ static int unit_log_resources(Unit *u) {
                                         nsec > NOTICEWORTHY_CPU_NSEC);
         }
 
+        (void) unit_get_memory_peak(u, &memory_peak);
+        if (memory_peak != UINT64_MAX) {
+                /* Format peak memory for inclusion in the structured log message */
+                if (asprintf(&t, "MEMORY_PEAK=%" PRIu64, memory_peak) < 0) {
+                        r = log_oom();
+                        goto finish;
+                }
+                iovec[n_iovec++] = IOVEC_MAKE_STRING(t);
+
+                /* Format peak memory for inclusion in the human language message string */
+                t = strjoin(FORMAT_BYTES(memory_peak), " memory peak");
+                if (!t) {
+                        r = log_oom();
+                        goto finish;
+                }
+                message_parts[n_message_parts++] = t;
+        }
+
         for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) {
                 uint64_t value = UINT64_MAX;
 

src/core/unit.h

@@ -365,6 +365,9 @@ typedef struct Unit {
         nsec_t cpu_usage_base;
         nsec_t cpu_usage_last; /* the most recently read value */
 
+        /* Most recently read value of memory.peak */
+        uint64_t memory_peak_last;
+
         /* The current counter of OOM kills initiated by systemd-oomd */
         uint64_t managed_oom_kill_last;
 

src/run/run.c

@@ -1049,6 +1049,7 @@ typedef struct RunContext {
         uint64_t inactive_enter_usec;
         char *result;
         uint64_t cpu_usage_nsec;
+        uint64_t memory_peak;
         uint64_t ip_ingress_bytes;
         uint64_t ip_egress_bytes;
         uint64_t io_read_bytes;
@@ -1110,6 +1111,7 @@ static int run_context_update(RunContext *c, const char *path) {
                 { "ExecMainCode",                    "i",    NULL,    offsetof(RunContext, exit_code)           },
                 { "ExecMainStatus",                  "i",    NULL,    offsetof(RunContext, exit_status)         },
                 { "CPUUsageNSec",                    "t",    NULL,    offsetof(RunContext, cpu_usage_nsec)      },
+                { "MemoryPeak",                      "t",    NULL,    offsetof(RunContext, memory_peak)         },
                 { "IPIngressBytes",                  "t",    NULL,    offsetof(RunContext, ip_ingress_bytes)    },
                 { "IPEgressBytes",                   "t",    NULL,    offsetof(RunContext, ip_egress_bytes)     },
                 { "IOReadBytes",                     "t",    NULL,    offsetof(RunContext, io_read_bytes)       },
@@ -1391,6 +1393,7 @@ static int start_transient_service(sd_bus *bus) {
         if (arg_wait || arg_stdio != ARG_STDIO_NONE) {
                 _cleanup_(run_context_free) RunContext c = {
                         .cpu_usage_nsec = NSEC_INFINITY,
+                        .memory_peak = UINT64_MAX,
                         .ip_ingress_bytes = UINT64_MAX,
                         .ip_egress_bytes = UINT64_MAX,
                         .io_read_bytes = UINT64_MAX,
@@ -1486,6 +1489,9 @@ static int start_transient_service(sd_bus *bus) {
                                 log_info("CPU time consumed: %s",
                                          FORMAT_TIMESPAN(DIV_ROUND_UP(c.cpu_usage_nsec, NSEC_PER_USEC), USEC_PER_MSEC));
 
+                        if (c.memory_peak != UINT64_MAX)
+                                log_info("Memory peak: %s", FORMAT_BYTES(c.memory_peak));
+
                         if (c.ip_ingress_bytes != UINT64_MAX)
                                 log_info("IP traffic received: %s", FORMAT_BYTES(c.ip_ingress_bytes));
 

src/systemctl/systemctl-show.c

@@ -250,6 +250,7 @@ typedef struct UnitStatusInfo {
 
         /* CGroup */
         uint64_t memory_current;
+        uint64_t memory_peak;
         uint64_t memory_min;
         uint64_t memory_low;
         uint64_t startup_memory_low;
@@ -702,7 +703,8 @@ static void print_status_info(
         if (i->memory_current != UINT64_MAX) {
                 printf("     Memory: %s", FORMAT_BYTES(i->memory_current));
 
-                if (i->memory_min > 0 ||
+                if (i->memory_peak != CGROUP_LIMIT_MAX ||
+                    i->memory_min > 0 ||
                     i->memory_low > 0 || i->startup_memory_low > 0 ||
                     i->memory_high != CGROUP_LIMIT_MAX || i->startup_memory_high != CGROUP_LIMIT_MAX ||
                     i->memory_max != CGROUP_LIMIT_MAX || i->startup_memory_max != CGROUP_LIMIT_MAX ||
@@ -765,6 +767,10 @@ static void print_status_info(
                                 printf("%savailable: %s", prefix, FORMAT_BYTES(i->memory_available));
                                 prefix = " ";
                         }
+                        if (i->memory_peak != CGROUP_LIMIT_MAX) {
+                                printf("%speak: %s", prefix, FORMAT_BYTES(i->memory_peak));
+                                prefix = " ";
+                        }
                         printf(")");
                 }
                 printf("\n");
@@ -2031,6 +2037,7 @@ static int show_one(
                 { "Where",                          "s",               NULL,           offsetof(UnitStatusInfo, where)                             },
                 { "What",                           "s",               NULL,           offsetof(UnitStatusInfo, what)                              },
                 { "MemoryCurrent",                  "t",               NULL,           offsetof(UnitStatusInfo, memory_current)                    },
+                { "MemoryPeak",                     "t",               NULL,           offsetof(UnitStatusInfo, memory_peak)                       },
                 { "MemoryAvailable",                "t",               NULL,           offsetof(UnitStatusInfo, memory_available)                  },
                 { "DefaultMemoryMin",               "t",               NULL,           offsetof(UnitStatusInfo, default_memory_min)                },
                 { "DefaultMemoryLow",               "t",               NULL,           offsetof(UnitStatusInfo, default_memory_low)                },
@@ -2087,6 +2094,7 @@ static int show_one(
                 .memory_zswap_max = CGROUP_LIMIT_MAX,
                 .startup_memory_zswap_max = CGROUP_LIMIT_MAX,
                 .memory_limit = CGROUP_LIMIT_MAX,
+                .memory_peak = CGROUP_LIMIT_MAX,
                 .memory_available = CGROUP_LIMIT_MAX,
                 .cpu_usage_nsec = UINT64_MAX,
                 .tasks_current = UINT64_MAX,