diff options
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | block/cfq-iosched.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 8427697c543..7bfea53c1bb 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3284,10 +3284,19 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, */ static void cfq_preempt_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq) { + struct cfq_queue *old_cfqq = cfqd->active_queue; + cfq_log_cfqq(cfqd, cfqq, "preempt"); cfq_slice_expired(cfqd, 1); /* + * workload type is changed, don't save slice, otherwise preempt + * doesn't happen + */ + if (cfqq_type(old_cfqq) != cfqq_type(cfqq)) + cfqq->cfqg->saved_workload_slice = 0; + + /* * Put the new queue at the front of the of the current list, * so we know that it will be selected next. */ |