cgroup: fix incorrectly setting memory cgroup

[elogind.git] / src / core / cgroup.c

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index b9ef00c6174d487d6ed4e1643cbb5e49f29aab66..244baff3da0a5c92fd45e443ffe78e17df4821a1 100644 (file)
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -114,7 +114,7 @@ void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix) {
 
         LIST_FOREACH(device_weights, w, c->blockio_device_weights)
                 fprintf(f,
-                        "%sBlockIOWeight=%s %lu",
+                        "%sBlockIODeviceWeight=%s %lu",
                         prefix,
                         w->path,
                         w->weight);
@@ -257,16 +257,23 @@ void cgroup_context_apply(CGroupContext *c, CGroupControllerMask mask, const cha
 
         if (mask & CGROUP_MEMORY) {
                 char buf[DECIMAL_STR_MAX(uint64_t) + 1];
+                if (c->memory_limit != (uint64_t) -1) {
+                        sprintf(buf, "%" PRIu64 "\n", c->memory_limit);
+                        r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf);
+                } else
+                        r = cg_set_attribute("memory", path, "memory.limit_in_bytes", "-1");
 
-                sprintf(buf, "%" PRIu64 "\n", c->memory_limit);
-                r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf);
                 if (r < 0)
                         log_error("Failed to set memory.limit_in_bytes on %s: %s", path, strerror(-r));
 
-                sprintf(buf, "%" PRIu64 "\n", c->memory_soft_limit);
-                cg_set_attribute("memory", path, "memory.soft_limit_in_bytes", buf);
+                if (c->memory_soft_limit != (uint64_t) -1) {
+                        sprintf(buf, "%" PRIu64 "\n", c->memory_soft_limit);
+                        r = cg_set_attribute("memory", path, "memory.soft_limit_in_bytes", buf);
+                } else
+                        r = cg_set_attribute("memory", path, "memory.soft_limit_in_bytes", "-1");
+
                 if (r < 0)
-                        log_error("Failed to set memory.limit_in_bytes on %s: %s", path, strerror(-r));
+                        log_error("Failed to set memory.soft_limit_in_bytes on %s: %s", path, strerror(-r));
         }
 
         if (mask & CGROUP_DEVICE) {
@@ -382,6 +389,7 @@ static CGroupControllerMask unit_get_siblings_mask(Unit *u) {
 static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
         char *path = NULL;
         int r;
+        bool is_in_hash = false;
 
         assert(u);
 
@@ -390,8 +398,14 @@ static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
                 return -ENOMEM;
 
         r = hashmap_put(u->manager->cgroup_unit, path, u);
-        if (r < 0)
+        if (r == 0)
+                is_in_hash = true;
+
+        if (r < 0) {
+                free(path);
+                log_error("cgroup %s exists already: %s", path, strerror(-r));
                 return r;
+        }
 
         /* First, create our own group */
         r = cg_create_with_mask(mask, path);
@@ -405,9 +419,12 @@ static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
                         log_error("Failed to migrate cgroup %s: %s", path, strerror(-r));
         }
 
-        /* And remember the new data */
-        free(u->cgroup_path);
-        u->cgroup_path = path;
+        if (!is_in_hash) {
+                /* And remember the new data */
+                free(u->cgroup_path);
+                u->cgroup_path = path;
+        }
+
         u->cgroup_realized = true;
         u->cgroup_mask = mask;
 
@@ -531,7 +548,7 @@ void unit_destroy_cgroup(Unit *u) {
         if (!u->cgroup_path)
                 return;
 
-        r = cg_trim_with_mask(u->cgroup_mask, u->cgroup_path, true);
+        r = cg_trim_with_mask(u->cgroup_mask, u->cgroup_path, !unit_has_name(u, SPECIAL_ROOT_SLICE));
         if (r < 0)
                 log_debug("Failed to destroy cgroup %s: %s", u->cgroup_path, strerror(-r));