diff options
Diffstat (limited to '')
| -rw-r--r-- | block/blk-throttle.c | 90 |
1 files changed, 56 insertions, 34 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 9f5fe62afff9..667b2958471a 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -1673,6 +1673,40 @@ struct blkcg_policy blkcg_policy_throtl = { .pd_free_fn = throtl_pd_free, }; +void blk_throtl_cancel_bios(struct request_queue *q) +{ + struct cgroup_subsys_state *pos_css; + struct blkcg_gq *blkg; + + spin_lock_irq(&q->queue_lock); + /* + * queue_lock is held, rcu lock is not needed here technically. + * However, rcu lock is still held to emphasize that following + * path need RCU protection and to prevent warning from lockdep. + */ + rcu_read_lock(); + blkg_for_each_descendant_post(blkg, pos_css, q->root_blkg) { + struct throtl_grp *tg = blkg_to_tg(blkg); + struct throtl_service_queue *sq = &tg->service_queue; + + /* + * Set the flag to make sure throtl_pending_timer_fn() won't + * stop until all throttled bios are dispatched. + */ + blkg_to_tg(blkg)->flags |= THROTL_TG_CANCELING; + /* + * Update disptime after setting the above flag to make sure + * throtl_select_dispatch() won't exit without dispatching. + */ + tg_update_disptime(tg); + + throtl_schedule_pending_timer(sq, jiffies + 1); + } + rcu_read_unlock(); + spin_unlock_irq(&q->queue_lock); +} + +#ifdef CONFIG_BLK_DEV_THROTTLING_LOW static unsigned long __tg_last_low_overflow_time(struct throtl_grp *tg) { unsigned long rtime = jiffies, wtime = jiffies; @@ -1777,39 +1811,6 @@ static bool throtl_hierarchy_can_upgrade(struct throtl_grp *tg) return false; } -void blk_throtl_cancel_bios(struct request_queue *q) -{ - struct cgroup_subsys_state *pos_css; - struct blkcg_gq *blkg; - - spin_lock_irq(&q->queue_lock); - /* - * queue_lock is held, rcu lock is not needed here technically. - * However, rcu lock is still held to emphasize that following - * path need RCU protection and to prevent warning from lockdep. - */ - rcu_read_lock(); - blkg_for_each_descendant_post(blkg, pos_css, q->root_blkg) { - struct throtl_grp *tg = blkg_to_tg(blkg); - struct throtl_service_queue *sq = &tg->service_queue; - - /* - * Set the flag to make sure throtl_pending_timer_fn() won't - * stop until all throttled bios are dispatched. - */ - blkg_to_tg(blkg)->flags |= THROTL_TG_CANCELING; - /* - * Update disptime after setting the above flag to make sure - * throtl_select_dispatch() won't exit without dispatching. - */ - tg_update_disptime(tg); - - throtl_schedule_pending_timer(sq, jiffies + 1); - } - rcu_read_unlock(); - spin_unlock_irq(&q->queue_lock); -} - static bool throtl_can_upgrade(struct throtl_data *td, struct throtl_grp *this_tg) { @@ -2005,7 +2006,6 @@ static void blk_throtl_update_idletime(struct throtl_grp *tg) tg->checked_last_finish_time = last_finish_time; } -#ifdef CONFIG_BLK_DEV_THROTTLING_LOW static void throtl_update_latency_buckets(struct throtl_data *td) { struct avg_latency_bucket avg_latency[2][LATENCY_BUCKET_SIZE]; @@ -2086,6 +2086,28 @@ static void throtl_update_latency_buckets(struct throtl_data *td) static inline void throtl_update_latency_buckets(struct throtl_data *td) { } + +static void blk_throtl_update_idletime(struct throtl_grp *tg) +{ +} + +static void throtl_downgrade_check(struct throtl_grp *tg) +{ +} + +static void throtl_upgrade_check(struct throtl_grp *tg) +{ +} + +static bool throtl_can_upgrade(struct throtl_data *td, + struct throtl_grp *this_tg) +{ + return false; +} + +static void throtl_upgrade_state(struct throtl_data *td) +{ +} #endif bool __blk_throtl_bio(struct bio *bio) |