mxqd: Move df_scratch up one level

Hoist up df_scratch one calllevel.

mxqd.c

@@ -1428,14 +1428,12 @@ static int can_start_job(struct mxq_group_list *group, unsigned long df_scratch,
     return 1;
 }
 
-unsigned long start_user(struct mxq_user_list *ulist, long slots_to_start)
+unsigned long start_user(struct mxq_user_list *ulist, long slots_to_start, unsigned long df_scratch)
 {
     struct mxq_server *server;
     struct mxq_group_list *glist;
     struct mxq_group *group;
 
-    unsigned long df_scratch;
-
     assert(ulist);
     assert(ulist->server);
     assert(ulist->groups);
@@ -1449,8 +1447,6 @@ unsigned long start_user(struct mxq_user_list *ulist, long slots_to_start)
     mx_log_debug(" user=%s(%d) slots_to_start=%ld :: trying to start jobs for user.",
             group->user_name, group->user_uid, slots_to_start);
 
-    df_scratch=mx_df(MXQ_JOB_TMPDIR_FS "/.");
-
     for (glist = ulist->groups; glist ; glist = glist->next) {
 
         group  = &glist->group;
@@ -1494,6 +1490,7 @@ long start_user_with_least_running_global_slot_count(struct mxq_server *server)
     unsigned long slots_free;
     unsigned long global_slots_per_user;
     int waiting = 0;
+    unsigned long df_scratch;
 
     assert(server);
 
@@ -1508,6 +1505,8 @@ long start_user_with_least_running_global_slot_count(struct mxq_server *server)
 
     global_slots_per_user = server->global_slots_running / server->user_cnt;
 
+    df_scratch=mx_df(MXQ_JOB_TMPDIR_FS "/.");
+
     for (ulist = server->users; ulist; ulist = ulist->next) {
         /* if a previous user is waiting for free resources, don't start jobs
          * for later users. */
@@ -1516,7 +1515,7 @@ long start_user_with_least_running_global_slot_count(struct mxq_server *server)
              * database to WAITING, which is just informational.  */
             return -1;
 
-        slots_started = start_user(ulist, slots_free);
+        slots_started = start_user(ulist, slots_free, df_scratch);
         if (slots_started)
             return slots_started;