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-rw-r--r--kernel/sched_fair.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 10aa6e1ae3dd..dfa18d55561d 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1280,6 +1280,42 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
1280 resched_task(rq->curr); 1280 resched_task(rq->curr);
1281} 1281}
1282 1282
1283/*
1284 * Priority of the task has changed. Check to see if we preempt
1285 * the current task.
1286 */
1287static void prio_changed_fair(struct rq *rq, struct task_struct *p,
1288 int oldprio, int running)
1289{
1290 /*
1291 * Reschedule if we are currently running on this runqueue and
1292 * our priority decreased, or if we are not currently running on
1293 * this runqueue and our priority is higher than the current's
1294 */
1295 if (running) {
1296 if (p->prio > oldprio)
1297 resched_task(rq->curr);
1298 } else
1299 check_preempt_curr(rq, p);
1300}
1301
1302/*
1303 * We switched to the sched_fair class.
1304 */
1305static void switched_to_fair(struct rq *rq, struct task_struct *p,
1306 int running)
1307{
1308 /*
1309 * We were most likely switched from sched_rt, so
1310 * kick off the schedule if running, otherwise just see
1311 * if we can still preempt the current task.
1312 */
1313 if (running)
1314 resched_task(rq->curr);
1315 else
1316 check_preempt_curr(rq, p);
1317}
1318
1283/* Account for a task changing its policy or group. 1319/* Account for a task changing its policy or group.
1284 * 1320 *
1285 * This routine is mostly called to set cfs_rq->curr field when a task 1321 * This routine is mostly called to set cfs_rq->curr field when a task
@@ -1318,6 +1354,9 @@ static const struct sched_class fair_sched_class = {
1318 .set_curr_task = set_curr_task_fair, 1354 .set_curr_task = set_curr_task_fair,
1319 .task_tick = task_tick_fair, 1355 .task_tick = task_tick_fair,
1320 .task_new = task_new_fair, 1356 .task_new = task_new_fair,
1357
1358 .prio_changed = prio_changed_fair,
1359 .switched_to = switched_to_fair,
1321}; 1360};
1322 1361
1323#ifdef CONFIG_SCHED_DEBUG 1362#ifdef CONFIG_SCHED_DEBUG