--- support/suexec.c.orig	2021-02-04 17:05:35.900988770 -0700
+++ support/suexec.c	2021-02-04 17:07:07.559046274 -0700
@@ -495,6 +495,34 @@
         exit(108);
     }
 
+    //DA_START
+    char user_slice[128];
+    snprintf(user_slice, sizeof(user_slice), "/sys/fs/cgroup/user.slice/user-%d.slice", uid);
+    if (mkdir(user_slice, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == 0 || errno == EEXIST) {
+	strcat(user_slice, "/directadmin-exec.scope");
+	if (mkdir(user_slice, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == 0 || errno == EEXIST) {
+	        strcat(user_slice, "/cgroup.procs");
+	        FILE *fp = fopen(user_slice, "a");
+	        //if there is no cgroup, we may hit permission denied. Wait moment.
+	        if (fp == NULL) {
+	            struct timespec ns;
+	            ns.tv_sec = 0;
+	            ns.tv_nsec = 10 * 1000000; //10ms
+	            int count=20;
+	            while (fp == NULL && count--) {
+	                nanosleep(&ns, NULL);
+	                fp = fopen(user_slice, "a");
+	            }
+	        }
+	        if (fp == NULL) {
+	            log_err("Error opening %s for writing: %s", user_slice, strerror(errno));
+	        } else {
+	            fprintf(fp, "%d\n", (int) getpid());
+	            fclose(fp);
+	        }
+	}
+    }
+    //DA_END
     /*
      * Change UID/GID here so that the following tests work over NFS.
      *