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-rw-r--r--kernel/sched.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 1847a44..b4dab63 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1955,7 +1955,7 @@ static int move_tasks(runqueue_t *this_rq, int this_cpu, runqueue_t *busiest,
{
prio_array_t *array, *dst_array;
struct list_head *head, *curr;
- int idx, pulled = 0, pinned = 0;
+ int idx, pulled = 0, pinned = 0, this_min_prio;
long rem_load_move;
task_t *tmp;
@@ -1964,6 +1964,7 @@ static int move_tasks(runqueue_t *this_rq, int this_cpu, runqueue_t *busiest,
rem_load_move = max_load_move;
pinned = 1;
+ this_min_prio = this_rq->curr->prio;
/*
* We first consider expired tasks. Those will likely not be
@@ -2003,7 +2004,12 @@ skip_queue:
curr = curr->prev;
- if (tmp->load_weight > rem_load_move ||
+ /*
+ * To help distribute high priority tasks accross CPUs we don't
+ * skip a task if it will be the highest priority task (i.e. smallest
+ * prio value) on its new queue regardless of its load weight
+ */
+ if ((idx >= this_min_prio && tmp->load_weight > rem_load_move) ||
!can_migrate_task(tmp, busiest, this_cpu, sd, idle, &pinned)) {
if (curr != head)
goto skip_queue;
@@ -2025,6 +2031,8 @@ skip_queue:
* and the prescribed amount of weighted load.
*/
if (pulled < max_nr_move && rem_load_move > 0) {
+ if (idx < this_min_prio)
+ this_min_prio = idx;
if (curr != head)
goto skip_queue;
idx++;