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Enable cgroup controllers for child cgroup creation #42

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Enable cgroup controllers for child cgroup creation #42

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10 changes: 10 additions & 0 deletions service/instance.c
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Original file line number Diff line number Diff line change
Expand Up @@ -636,6 +636,16 @@ instance_add_cgroup(const char *service, const char *instance)
if (stat("/sys/fs/cgroup/cgroup.subtree_control", &sb))
return 0;

/* Enable controllers in the parent cgroup before creating the child */
fd = open("/sys/fs/cgroup/cgroup.subtree_control", O_WRONLY);
if (fd >= 0) {
if (write(fd, "+cpu +memory +pids", 18) < 0) {
/* Ignore errors; controllers may already be enabled
* or not available. */
}
close(fd);
}

ret = snprintf(cgnamebuf, sizeof(cgnamebuf), "%s/%s/%s", CGROUP_BASEDIR,
service, instance);
if (ret >= sizeof(cgnamebuf))
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