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Diffstat (limited to 'src/core/cgroup.c')
-rw-r--r--src/core/cgroup.c69
1 files changed, 51 insertions, 18 deletions
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index ca3c3366f3..7873f88785 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -66,6 +66,7 @@ void cgroup_context_init(CGroupContext *c) {
c->memory_high = CGROUP_LIMIT_MAX;
c->memory_max = CGROUP_LIMIT_MAX;
+ c->memory_swap_max = CGROUP_LIMIT_MAX;
c->memory_limit = CGROUP_LIMIT_MAX;
@@ -173,6 +174,7 @@ void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) {
"%sMemoryLow=%" PRIu64 "\n"
"%sMemoryHigh=%" PRIu64 "\n"
"%sMemoryMax=%" PRIu64 "\n"
+ "%sMemorySwapMax=%" PRIu64 "\n"
"%sMemoryLimit=%" PRIu64 "\n"
"%sTasksMax=%" PRIu64 "\n"
"%sDevicePolicy=%s\n"
@@ -194,6 +196,7 @@ void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) {
prefix, c->memory_low,
prefix, c->memory_high,
prefix, c->memory_max,
+ prefix, c->memory_swap_max,
prefix, c->memory_limit,
prefix, c->tasks_max,
prefix, cgroup_device_policy_to_string(c->device_policy),
@@ -617,7 +620,7 @@ static unsigned cgroup_apply_blkio_device_limit(Unit *u, const char *dev_path, u
}
static bool cgroup_context_has_unified_memory_config(CGroupContext *c) {
- return c->memory_low > 0 || c->memory_high != CGROUP_LIMIT_MAX || c->memory_max != CGROUP_LIMIT_MAX;
+ return c->memory_low > 0 || c->memory_high != CGROUP_LIMIT_MAX || c->memory_max != CGROUP_LIMIT_MAX || c->memory_swap_max != CGROUP_LIMIT_MAX;
}
static void cgroup_apply_unified_memory_limit(Unit *u, const char *file, uint64_t v) {
@@ -665,7 +668,7 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
bool has_weight = cgroup_context_has_cpu_weight(c);
bool has_shares = cgroup_context_has_cpu_shares(c);
- if (cg_unified() > 0) {
+ if (cg_all_unified() > 0) {
uint64_t weight;
if (has_weight)
@@ -846,12 +849,14 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
}
if ((mask & CGROUP_MASK_MEMORY) && !is_root) {
- if (cg_unified() > 0) {
+ if (cg_all_unified() > 0) {
uint64_t max = c->memory_max;
+ uint64_t swap_max = c->memory_swap_max;
- if (cgroup_context_has_unified_memory_config(c))
+ if (cgroup_context_has_unified_memory_config(c)) {
max = c->memory_max;
- else {
+ swap_max = c->memory_swap_max;
+ } else {
max = c->memory_limit;
if (max != CGROUP_LIMIT_MAX)
@@ -861,6 +866,7 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
cgroup_apply_unified_memory_limit(u, "memory.low", c->memory_low);
cgroup_apply_unified_memory_limit(u, "memory.high", c->memory_high);
cgroup_apply_unified_memory_limit(u, "memory.max", max);
+ cgroup_apply_unified_memory_limit(u, "memory.swap.max", swap_max);
} else {
char buf[DECIMAL_STR_MAX(uint64_t) + 1];
uint64_t val = c->memory_limit;
@@ -1019,7 +1025,7 @@ CGroupMask unit_get_own_mask(Unit *u) {
e = unit_get_exec_context(u);
if (!e ||
exec_context_maintains_privileges(e) ||
- cg_unified() > 0)
+ cg_all_unified() > 0)
return _CGROUP_MASK_ALL;
}
@@ -1245,7 +1251,7 @@ int unit_watch_cgroup(Unit *u) {
return 0;
/* Only applies to the unified hierarchy */
- r = cg_unified();
+ r = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
if (r < 0)
return log_unit_error_errno(u, r, "Failed detect whether the unified hierarchy is used: %m");
if (r == 0)
@@ -1524,6 +1530,8 @@ void unit_prune_cgroup(Unit *u) {
if (!u->cgroup_path)
return;
+ (void) unit_get_cpu_usage(u, NULL); /* Cache the last CPU usage value before we destroy the cgroup */
+
is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE);
r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !is_root_slice);
@@ -1645,7 +1653,7 @@ int unit_watch_all_pids(Unit *u) {
if (!u->cgroup_path)
return -ENOENT;
- if (cg_unified() > 0) /* On unified we can use proper notifications */
+ if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) > 0) /* On unified we can use proper notifications */
return 0;
return unit_watch_pids_in_path(u, u->cgroup_path);
@@ -1718,7 +1726,7 @@ static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents,
int manager_setup_cgroup(Manager *m) {
_cleanup_free_ char *path = NULL;
CGroupController c;
- int r, unified;
+ int r, all_unified, systemd_unified;
char *e;
assert(m);
@@ -1755,11 +1763,17 @@ int manager_setup_cgroup(Manager *m) {
if (r < 0)
return log_error_errno(r, "Cannot find cgroup mount point: %m");
- unified = cg_unified();
- if (unified < 0)
- return log_error_errno(r, "Couldn't determine if we are running in the unified hierarchy: %m");
- if (unified > 0)
+ all_unified = cg_all_unified();
+ systemd_unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
+
+ if (all_unified < 0 || systemd_unified < 0)
+ return log_error_errno(all_unified < 0 ? all_unified : systemd_unified,
+ "Couldn't determine if we are running in the unified hierarchy: %m");
+
+ if (all_unified > 0)
log_debug("Unified cgroup hierarchy is located at %s.", path);
+ else if (systemd_unified > 0)
+ log_debug("Unified cgroup hierarchy is located at %s. Controllers are on legacy hierarchies.", path);
else
log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path);
@@ -1767,7 +1781,7 @@ int manager_setup_cgroup(Manager *m) {
const char *scope_path;
/* 3. Install agent */
- if (unified) {
+ if (systemd_unified) {
/* In the unified hierarchy we can get
* cgroup empty notifications via inotify. */
@@ -1827,7 +1841,7 @@ int manager_setup_cgroup(Manager *m) {
return log_error_errno(errno, "Failed to open pin file: %m");
/* 6. Always enable hierarchical support if it exists... */
- if (!unified)
+ if (!all_unified)
(void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
}
@@ -1953,7 +1967,7 @@ int unit_get_memory_current(Unit *u, uint64_t *ret) {
if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0)
return -ENODATA;
- if (cg_unified() <= 0)
+ if (cg_all_unified() <= 0)
r = cg_get_attribute("memory", u->cgroup_path, "memory.usage_in_bytes", &v);
else
r = cg_get_attribute("memory", u->cgroup_path, "memory.current", &v);
@@ -1998,7 +2012,7 @@ static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) {
if (!u->cgroup_path)
return -ENODATA;
- if (cg_unified() > 0) {
+ if (cg_all_unified() > 0) {
const char *keys[] = { "usage_usec", NULL };
_cleanup_free_ char *val = NULL;
uint64_t us;
@@ -2038,7 +2052,21 @@ int unit_get_cpu_usage(Unit *u, nsec_t *ret) {
nsec_t ns;
int r;
+ assert(u);
+
+ /* Retrieve the current CPU usage counter. This will subtract the CPU counter taken when the unit was
+ * started. If the cgroup has been removed already, returns the last cached value. To cache the value, simply
+ * call this function with a NULL return value. */
+
r = unit_get_cpu_usage_raw(u, &ns);
+ if (r == -ENODATA && u->cpu_usage_last != NSEC_INFINITY) {
+ /* If we can't get the CPU usage anymore (because the cgroup was already removed, for example), use our
+ * cached value. */
+
+ if (ret)
+ *ret = u->cpu_usage_last;
+ return 0;
+ }
if (r < 0)
return r;
@@ -2047,7 +2075,10 @@ int unit_get_cpu_usage(Unit *u, nsec_t *ret) {
else
ns = 0;
- *ret = ns;
+ u->cpu_usage_last = ns;
+ if (ret)
+ *ret = ns;
+
return 0;
}
@@ -2057,6 +2088,8 @@ int unit_reset_cpu_usage(Unit *u) {
assert(u);
+ u->cpu_usage_last = NSEC_INFINITY;
+
r = unit_get_cpu_usage_raw(u, &ns);
if (r < 0) {
u->cpu_usage_base = 0;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-05-02 22:19:55 +0000