diff options
| -rw-r--r-- | block/cfq-iosched.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 918c7fd9aeb..ee130f14d1f 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3077,6 +3077,12 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, return true; /* + * Don't allow a non-RT request to preempt an ongoing RT cfqq timeslice. + */ + if (cfq_class_rt(cfqq) && !cfq_class_rt(new_cfqq)) + return false; + + /* * if the new request is sync, but the currently running queue is * not, let the sync request have priority. */ |