sched/balancing: Rename find_busiest_queue() => sched_balance_find_src_rq()

The find_busiest_queue() naming has two small quirks:

 - Scheduler functions that deal with runqueues usually have a rq_ prefix
   or _rq postfix, but this function has neither.

 - Plus the 'busiest' qualifier to this function was historically
   correct, but has become somewhat of a misnomer: in quite a few
   cases we will not pick the busiest runqueue - but the best
   (possible) runqueue we can balance tasks from. So name it a
   bit more neutrally, similar to the 'src/dst' nomenclature
   we are already using when moving tasks between runqueues.

To fix both quirks, and to standardize scheduler load-balancing
function names on the sched_balance_() prefix, rename the
function to sched_balance_find_src_rq().

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Link: https://lore.kernel.org/r/20240308111819.1101550-7-mingo@kernel.org

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 0d2753c50be9d626214919fc45c2c6793457cb7c..1cd9a18b35e09c103ed696662df219f316d653ae 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -10959,9 +10959,9 @@ out_balanced:
 }
 
 /*
- * find_busiest_queue - find the busiest runqueue among the CPUs in the group.
+ * sched_balance_find_src_rq - find the busiest runqueue among the CPUs in the group.
  */
-static struct rq *find_busiest_queue(struct lb_env *env,
+static struct rq *sched_balance_find_src_rq(struct lb_env *env,
                                     struct sched_group *group)
 {
        struct rq *busiest = NULL, *rq;
@@ -11280,7 +11280,7 @@ redo:
                goto out_balanced;
        }
 
-       busiest = find_busiest_queue(&env, group);
+       busiest = sched_balance_find_src_rq(&env, group);
        if (!busiest) {
                schedstat_inc(sd->lb_nobusyq[idle]);
                goto out_balanced;