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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-01-19 12:09:53 +1100 |
|---|---|---|
| committer | Jens Axboe <axboe@carl.home.kernel.dk> | 2007-02-11 23:14:45 +0100 |
| commit | 28f95cbc3ec01f2c7d248e1a4a384f37e9c2ab16 (patch) | |
| tree | 81981dbecdfbf657bb0b099cd23fb794789b3cc2 /block/cfq-iosched.c | |
| parent | 3c6bd2f879d2c12ce369fe5f75e608ac7bacf01a (diff) | |
| download | lwn-28f95cbc3ec01f2c7d248e1a4a384f37e9c2ab16.tar.gz lwn-28f95cbc3ec01f2c7d248e1a4a384f37e9c2ab16.zip | |
cfq-iosched: remove the implicit queue kicking in slice expire
We only really need it for a process going away, so move it to
those locations.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | block/cfq-iosched.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index bf571b2b7d76..6aa5523f514c 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -693,9 +693,6 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq, if (cfq_cfqq_wait_request(cfqq)) del_timer(&cfqd->idle_slice_timer); - if (!preempted && !cfq_cfqq_dispatched(cfqq)) - cfq_schedule_dispatch(cfqd); - cfq_clear_cfqq_must_dispatch(cfqq); cfq_clear_cfqq_wait_request(cfqq); cfq_clear_cfqq_queue_new(cfqq); @@ -1102,8 +1099,10 @@ static void cfq_put_queue(struct cfq_queue *cfqq) BUG_ON(cfqq->allocated[READ] + cfqq->allocated[WRITE]); BUG_ON(cfq_cfqq_on_rr(cfqq)); - if (unlikely(cfqd->active_queue == cfqq)) + if (unlikely(cfqd->active_queue == cfqq)) { __cfq_slice_expired(cfqd, cfqq, 0, 0); + cfq_schedule_dispatch(cfqd); + } /* * it's on the empty list and still hashed @@ -1158,8 +1157,10 @@ static void cfq_free_io_context(struct io_context *ioc) static void cfq_exit_cfqq(struct cfq_data *cfqd, struct cfq_queue *cfqq) { - if (unlikely(cfqq == cfqd->active_queue)) + if (unlikely(cfqq == cfqd->active_queue)) { __cfq_slice_expired(cfqd, cfqq, 0, 0); + cfq_schedule_dispatch(cfqd); + } cfq_put_queue(cfqq); } @@ -1565,7 +1566,6 @@ cfq_update_idle_window(struct cfq_data *cfqd, struct cfq_queue *cfqq, cfq_clear_cfqq_idle_window(cfqq); } - /* * Check if new_cfqq should preempt the currently active queue. Return 0 for * no or if we aren't sure, a 1 will cause a preempt. |