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authorJens Axboe <jens.axboe@oracle.com>2007-04-20 20:45:39 +0200
committerJens Axboe <axboe@nelson.home.kernel.dk>2007-04-30 09:01:23 +0200
commitcc19747977824ece6aa1c56a29e974fef5ec2b32 (patch)
treebbb07231a1323ddd007a11eb2683188492d2e26e /block
parent3ed9a2965c47636bc0ebafab31a39f1c105492ca (diff)
downloadconfigs-cc19747977824ece6aa1c56a29e974fef5ec2b32.tar.gz
cfq-iosched: tighten queue request overlap condition
For tagged devices, allow overlap of requests if the idle window isn't enabled on the current active queue. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/cfq-iosched.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index a8237be97a2..e859b4966e4 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -989,7 +989,8 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
* flight or is idling for a new request, allow either of these
* conditions to happen (or time out) before selecting a new queue.
*/
- if (cfqq->dispatched || timer_pending(&cfqd->idle_slice_timer)) {
+ if (timer_pending(&cfqd->idle_slice_timer) ||
+ (cfqq->dispatched && cfq_cfqq_idle_window(cfqq))) {
cfqq = NULL;
goto keep_queue;
}