diff options
Diffstat (limited to 'drivers/block/cfq-iosched.c')
-rw-r--r-- | drivers/block/cfq-iosched.c | 49 |
1 files changed, 24 insertions, 25 deletions
diff --git a/drivers/block/cfq-iosched.c b/drivers/block/cfq-iosched.c index ff1cc968f96d..de5746e38af9 100644 --- a/drivers/block/cfq-iosched.c +++ b/drivers/block/cfq-iosched.c | |||
@@ -300,7 +300,6 @@ CFQ_CRQ_FNS(requeued); | |||
300 | static struct cfq_queue *cfq_find_cfq_hash(struct cfq_data *, unsigned int, unsigned short); | 300 | static struct cfq_queue *cfq_find_cfq_hash(struct cfq_data *, unsigned int, unsigned short); |
301 | static void cfq_dispatch_sort(request_queue_t *, struct cfq_rq *); | 301 | static void cfq_dispatch_sort(request_queue_t *, struct cfq_rq *); |
302 | static void cfq_put_cfqd(struct cfq_data *cfqd); | 302 | static void cfq_put_cfqd(struct cfq_data *cfqd); |
303 | static inline int cfq_pending_requests(struct cfq_data *cfqd); | ||
304 | 303 | ||
305 | #define process_sync(tsk) ((tsk)->flags & PF_SYNCWRITE) | 304 | #define process_sync(tsk) ((tsk)->flags & PF_SYNCWRITE) |
306 | 305 | ||
@@ -348,6 +347,28 @@ static struct request *cfq_find_rq_hash(struct cfq_data *cfqd, sector_t offset) | |||
348 | return NULL; | 347 | return NULL; |
349 | } | 348 | } |
350 | 349 | ||
350 | static inline int cfq_pending_requests(struct cfq_data *cfqd) | ||
351 | { | ||
352 | return !list_empty(&cfqd->queue->queue_head) || cfqd->busy_queues; | ||
353 | } | ||
354 | |||
355 | /* | ||
356 | * scheduler run of queue, if there are requests pending and no one in the | ||
357 | * driver that will restart queueing | ||
358 | */ | ||
359 | static inline void cfq_schedule_dispatch(struct cfq_data *cfqd) | ||
360 | { | ||
361 | if (!cfqd->rq_in_driver && cfq_pending_requests(cfqd)) | ||
362 | kblockd_schedule_work(&cfqd->unplug_work); | ||
363 | } | ||
364 | |||
365 | static int cfq_queue_empty(request_queue_t *q) | ||
366 | { | ||
367 | struct cfq_data *cfqd = q->elevator->elevator_data; | ||
368 | |||
369 | return !cfq_pending_requests(cfqd); | ||
370 | } | ||
371 | |||
351 | /* | 372 | /* |
352 | * Lifted from AS - choose which of crq1 and crq2 that is best served now. | 373 | * Lifted from AS - choose which of crq1 and crq2 that is best served now. |
353 | * We choose the request that is closest to the head right now. Distance | 374 | * We choose the request that is closest to the head right now. Distance |
@@ -1072,16 +1093,6 @@ cfq_prio_to_maxrq(struct cfq_data *cfqd, struct cfq_queue *cfqq) | |||
1072 | } | 1093 | } |
1073 | 1094 | ||
1074 | /* | 1095 | /* |
1075 | * scheduler run of queue, if there are requests pending and no one in the | ||
1076 | * driver that will restart queueing | ||
1077 | */ | ||
1078 | static inline void cfq_schedule_dispatch(struct cfq_data *cfqd) | ||
1079 | { | ||
1080 | if (!cfqd->rq_in_driver && cfq_pending_requests(cfqd)) | ||
1081 | kblockd_schedule_work(&cfqd->unplug_work); | ||
1082 | } | ||
1083 | |||
1084 | /* | ||
1085 | * get next queue for service | 1096 | * get next queue for service |
1086 | */ | 1097 | */ |
1087 | static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd, int force) | 1098 | static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd, int force) |
@@ -1846,18 +1857,6 @@ cfq_insert_request(request_queue_t *q, struct request *rq, int where) | |||
1846 | } | 1857 | } |
1847 | } | 1858 | } |
1848 | 1859 | ||
1849 | static inline int cfq_pending_requests(struct cfq_data *cfqd) | ||
1850 | { | ||
1851 | return !list_empty(&cfqd->queue->queue_head) || cfqd->busy_queues; | ||
1852 | } | ||
1853 | |||
1854 | static int cfq_queue_empty(request_queue_t *q) | ||
1855 | { | ||
1856 | struct cfq_data *cfqd = q->elevator->elevator_data; | ||
1857 | |||
1858 | return !cfq_pending_requests(cfqd); | ||
1859 | } | ||
1860 | |||
1861 | static void cfq_completed_request(request_queue_t *q, struct request *rq) | 1860 | static void cfq_completed_request(request_queue_t *q, struct request *rq) |
1862 | { | 1861 | { |
1863 | struct cfq_rq *crq = RQ_DATA(rq); | 1862 | struct cfq_rq *crq = RQ_DATA(rq); |
@@ -1952,7 +1951,7 @@ __cfq_may_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq, | |||
1952 | { | 1951 | { |
1953 | #if 1 | 1952 | #if 1 |
1954 | if ((cfq_cfqq_wait_request(cfqq) || cfq_cfqq_must_alloc(cfqq)) && | 1953 | if ((cfq_cfqq_wait_request(cfqq) || cfq_cfqq_must_alloc(cfqq)) && |
1955 | !cfq_cfqq_must_alloc_slice) { | 1954 | !cfq_cfqq_must_alloc_slice(cfqq)) { |
1956 | cfq_mark_cfqq_must_alloc_slice(cfqq); | 1955 | cfq_mark_cfqq_must_alloc_slice(cfqq); |
1957 | return ELV_MQUEUE_MUST; | 1956 | return ELV_MQUEUE_MUST; |
1958 | } | 1957 | } |
@@ -1969,7 +1968,7 @@ __cfq_may_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq, | |||
1969 | * only allow 1 ELV_MQUEUE_MUST per slice, otherwise we | 1968 | * only allow 1 ELV_MQUEUE_MUST per slice, otherwise we |
1970 | * can quickly flood the queue with writes from a single task | 1969 | * can quickly flood the queue with writes from a single task |
1971 | */ | 1970 | */ |
1972 | if (rw == READ || !cfq_cfqq_must_alloc_slice) { | 1971 | if (rw == READ || !cfq_cfqq_must_alloc_slice(cfqq)) { |
1973 | cfq_mark_cfqq_must_alloc_slice(cfqq); | 1972 | cfq_mark_cfqq_must_alloc_slice(cfqq); |
1974 | return ELV_MQUEUE_MUST; | 1973 | return ELV_MQUEUE_MUST; |
1975 | } | 1974 | } |