diff options
Diffstat (limited to 'kernel/sched_rt.c')
| -rw-r--r-- | kernel/sched_rt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index f8fb3edadcaa..d047f288c411 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -1218,6 +1218,18 @@ static int pull_rt_task(struct rq *this_rq) continue; src_rq = cpu_rq(cpu); + + /* + * Don't bother taking the src_rq->lock if the next highest + * task is known to be lower-priority than our current task. + * This may look racy, but if this value is about to go + * logically higher, the src_rq will push this task away. + * And if its going logically lower, we do not care + */ + if (src_rq->rt.highest_prio.next >= + this_rq->rt.highest_prio.curr) + continue; + /* * We can potentially drop this_rq's lock in * double_lock_balance, and another CPU could |