diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/elevator.c | 45 | ||||
| -rw-r--r-- | block/ll_rw_blk.c | 7 |
2 files changed, 20 insertions, 32 deletions
diff --git a/block/elevator.c b/block/elevator.c index c9f424d5399..96a61e029ce 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -139,35 +139,16 @@ static int elevator_attach(request_queue_t *q, struct elevator_type *e, static char chosen_elevator[16]; -static void elevator_setup_default(void) +static int __init elevator_setup(char *str) { - struct elevator_type *e; - - /* - * If default has not been set, use the compiled-in selection. - */ - if (!chosen_elevator[0]) - strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED); - /* * Be backwards-compatible with previous kernels, so users * won't get the wrong elevator. */ - if (!strcmp(chosen_elevator, "as")) + if (!strcmp(str, "as")) strcpy(chosen_elevator, "anticipatory"); - - /* - * If the given scheduler is not available, fall back to the default - */ - if ((e = elevator_find(chosen_elevator))) - elevator_put(e); else - strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED); -} - -static int __init elevator_setup(char *str) -{ - strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1); + strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1); return 0; } @@ -184,14 +165,16 @@ int elevator_init(request_queue_t *q, char *name) q->end_sector = 0; q->boundary_rq = NULL; - elevator_setup_default(); + if (name && !(e = elevator_get(name))) + return -EINVAL; - if (!name) - name = chosen_elevator; + if (!e && *chosen_elevator && !(e = elevator_get(chosen_elevator))) + printk("I/O scheduler %s not found\n", chosen_elevator); - e = elevator_get(name); - if (!e) - return -EINVAL; + if (!e && !(e = elevator_get(CONFIG_DEFAULT_IOSCHED))) { + printk("Default I/O scheduler not found, using no-op\n"); + e = elevator_get("noop"); + } eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL); if (!eq) { @@ -669,8 +652,10 @@ int elv_register(struct elevator_type *e) spin_unlock_irq(&elv_list_lock); printk(KERN_INFO "io scheduler %s registered", e->elevator_name); - if (!strcmp(e->elevator_name, chosen_elevator)) - printk(" (default)"); + if (!strcmp(e->elevator_name, chosen_elevator) || + (!*chosen_elevator && + !strcmp(e->elevator_name, CONFIG_DEFAULT_IOSCHED))) + printk(" (default)"); printk("\n"); return 0; } diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 8e27d0ab0d7..d38b4afa37e 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -304,6 +304,7 @@ static inline void rq_init(request_queue_t *q, struct request *rq) * blk_queue_ordered - does this queue support ordered writes * @q: the request queue * @ordered: one of QUEUE_ORDERED_* + * @prepare_flush_fn: rq setup helper for cache flush ordered writes * * Description: * For journalled file systems, doing ordered writes on a commit @@ -332,6 +333,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered, return -EINVAL; } + q->ordered = ordered; q->next_ordered = ordered; q->prepare_flush_fn = prepare_flush_fn; @@ -662,7 +664,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit); * Enables a low level driver to set an upper limit on the size of * received requests. **/ -void blk_queue_max_sectors(request_queue_t *q, unsigned short max_sectors) +void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors) { if ((max_sectors << 9) < PAGE_CACHE_SIZE) { max_sectors = 1 << (PAGE_CACHE_SHIFT - 9); @@ -2632,6 +2634,7 @@ EXPORT_SYMBOL(blk_put_request); /** * blk_end_sync_rq - executes a completion event on a request * @rq: request to complete + * @error: end io status of the request */ void blk_end_sync_rq(struct request *rq, int error) { @@ -3153,7 +3156,7 @@ static int __end_that_request_first(struct request *req, int uptodate, if (blk_fs_request(req) && req->rq_disk) { const int rw = rq_data_dir(req); - __disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9); + disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9); } total_bytes = bio_nbytes = 0; |