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-rw-r--r--block/bfq-iosched.c12
-rw-r--r--block/blk-core.c4
-rw-r--r--block/blk-iocost.c12
-rw-r--r--block/blk-mq.c118
-rw-r--r--block/mq-deadline.c1
5 files changed, 85 insertions, 62 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 038e075e05b8..0d46cb728bbf 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -571,7 +571,7 @@ static bool bfqq_request_over_limit(struct bfq_queue *bfqq, int limit)
struct bfq_entity *entity = &bfqq->entity;
struct bfq_entity *inline_entities[BFQ_LIMIT_INLINE_DEPTH];
struct bfq_entity **entities = inline_entities;
- int depth, level;
+ int depth, level, alloc_depth = BFQ_LIMIT_INLINE_DEPTH;
int class_idx = bfqq->ioprio_class - 1;
struct bfq_sched_data *sched_data;
unsigned long wsum;
@@ -580,15 +580,21 @@ static bool bfqq_request_over_limit(struct bfq_queue *bfqq, int limit)
if (!entity->on_st_or_in_serv)
return false;
+retry:
+ spin_lock_irq(&bfqd->lock);
/* +1 for bfqq entity, root cgroup not included */
depth = bfqg_to_blkg(bfqq_group(bfqq))->blkcg->css.cgroup->level + 1;
- if (depth > BFQ_LIMIT_INLINE_DEPTH) {
+ if (depth > alloc_depth) {
+ spin_unlock_irq(&bfqd->lock);
+ if (entities != inline_entities)
+ kfree(entities);
entities = kmalloc_array(depth, sizeof(*entities), GFP_NOIO);
if (!entities)
return false;
+ alloc_depth = depth;
+ goto retry;
}
- spin_lock_irq(&bfqd->lock);
sched_data = entity->sched_data;
/* Gather our ancestors as we need to traverse them in reverse order */
level = 0;
diff --git a/block/blk-core.c b/block/blk-core.c
index 23312df7d25d..80fa73c419a9 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -50,7 +50,6 @@
#include "blk-pm.h"
#include "blk-cgroup.h"
#include "blk-throttle.h"
-#include "blk-rq-qos.h"
struct dentry *blk_debugfs_root;
@@ -315,9 +314,6 @@ void blk_cleanup_queue(struct request_queue *q)
*/
blk_freeze_queue(q);
- /* cleanup rq qos structures for queue without disk */
- rq_qos_exit(q);
-
blk_queue_flag_set(QUEUE_FLAG_DEAD, q);
blk_sync_queue(q);
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 8132d49df37b..33a11ba971ea 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2315,7 +2315,17 @@ static void ioc_timer_fn(struct timer_list *timer)
iocg->hweight_donating = hwa;
iocg->hweight_after_donation = new_hwi;
list_add(&iocg->surplus_list, &surpluses);
- } else {
+ } else if (!iocg->abs_vdebt) {
+ /*
+ * @iocg doesn't have enough to donate. Reset
+ * its inuse to active.
+ *
+ * Don't reset debtors as their inuse's are
+ * owned by debt handling. This shouldn't affect
+ * donation calculuation in any meaningful way
+ * as @iocg doesn't have a meaningful amount of
+ * share anyway.
+ */
TRACE_IOCG_PATH(inuse_shortage, iocg, &now,
iocg->inuse, iocg->active,
iocg->hweight_inuse, new_hwi);
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9ef2d3284752..ae116b755648 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1131,14 +1131,7 @@ void blk_mq_start_request(struct request *rq)
trace_block_rq_issue(rq);
if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) {
- u64 start_time;
-#ifdef CONFIG_BLK_CGROUP
- if (rq->bio)
- start_time = bio_issue_time(&rq->bio->bi_issue);
- else
-#endif
- start_time = ktime_get_ns();
- rq->io_start_time_ns = start_time;
+ rq->io_start_time_ns = ktime_get_ns();
rq->stats_sectors = blk_rq_sectors(rq);
rq->rq_flags |= RQF_STATS;
rq_qos_issue(q, rq);
@@ -1176,6 +1169,62 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t error)
complete(waiting);
}
+/*
+ * Allow 2x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple
+ * queues. This is important for md arrays to benefit from merging
+ * requests.
+ */
+static inline unsigned short blk_plug_max_rq_count(struct blk_plug *plug)
+{
+ if (plug->multiple_queues)
+ return BLK_MAX_REQUEST_COUNT * 2;
+ return BLK_MAX_REQUEST_COUNT;
+}
+
+static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
+{
+ struct request *last = rq_list_peek(&plug->mq_list);
+
+ if (!plug->rq_count) {
+ trace_block_plug(rq->q);
+ } else if (plug->rq_count >= blk_plug_max_rq_count(plug) ||
+ (!blk_queue_nomerges(rq->q) &&
+ blk_rq_bytes(last) >= BLK_PLUG_FLUSH_SIZE)) {
+ blk_mq_flush_plug_list(plug, false);
+ trace_block_plug(rq->q);
+ }
+
+ if (!plug->multiple_queues && last && last->q != rq->q)
+ plug->multiple_queues = true;
+ if (!plug->has_elevator && (rq->rq_flags & RQF_ELV))
+ plug->has_elevator = true;
+ rq->rq_next = NULL;
+ rq_list_add(&plug->mq_list, rq);
+ plug->rq_count++;
+}
+
+static void __blk_execute_rq_nowait(struct request *rq, bool at_head,
+ rq_end_io_fn *done, bool use_plug)
+{
+ WARN_ON(irqs_disabled());
+ WARN_ON(!blk_rq_is_passthrough(rq));
+
+ rq->end_io = done;
+
+ blk_account_io_start(rq);
+
+ if (use_plug && current->plug) {
+ blk_add_rq_to_plug(current->plug, rq);
+ return;
+ }
+ /*
+ * don't check dying flag for MQ because the request won't
+ * be reused after dying flag is set
+ */
+ blk_mq_sched_insert_request(rq, at_head, true, false);
+}
+
+
/**
* blk_execute_rq_nowait - insert a request to I/O scheduler for execution
* @rq: request to insert
@@ -1191,18 +1240,8 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t error)
*/
void blk_execute_rq_nowait(struct request *rq, bool at_head, rq_end_io_fn *done)
{
- WARN_ON(irqs_disabled());
- WARN_ON(!blk_rq_is_passthrough(rq));
-
- rq->end_io = done;
+ __blk_execute_rq_nowait(rq, at_head, done, true);
- blk_account_io_start(rq);
-
- /*
- * don't check dying flag for MQ because the request won't
- * be reused after dying flag is set
- */
- blk_mq_sched_insert_request(rq, at_head, true, false);
}
EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
@@ -1240,8 +1279,13 @@ blk_status_t blk_execute_rq(struct request *rq, bool at_head)
DECLARE_COMPLETION_ONSTACK(wait);
unsigned long hang_check;
+ /*
+ * iopoll requires request to be submitted to driver, so can't
+ * use plug
+ */
rq->end_io_data = &wait;
- blk_execute_rq_nowait(rq, at_head, blk_end_sync_rq);
+ __blk_execute_rq_nowait(rq, at_head, blk_end_sync_rq,
+ !blk_rq_is_poll(rq));
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
@@ -2683,40 +2727,6 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
hctx->queue->mq_ops->commit_rqs(hctx);
}
-/*
- * Allow 2x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple
- * queues. This is important for md arrays to benefit from merging
- * requests.
- */
-static inline unsigned short blk_plug_max_rq_count(struct blk_plug *plug)
-{
- if (plug->multiple_queues)
- return BLK_MAX_REQUEST_COUNT * 2;
- return BLK_MAX_REQUEST_COUNT;
-}
-
-static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
-{
- struct request *last = rq_list_peek(&plug->mq_list);
-
- if (!plug->rq_count) {
- trace_block_plug(rq->q);
- } else if (plug->rq_count >= blk_plug_max_rq_count(plug) ||
- (!blk_queue_nomerges(rq->q) &&
- blk_rq_bytes(last) >= BLK_PLUG_FLUSH_SIZE)) {
- blk_mq_flush_plug_list(plug, false);
- trace_block_plug(rq->q);
- }
-
- if (!plug->multiple_queues && last && last->q != rq->q)
- plug->multiple_queues = true;
- if (!plug->has_elevator && (rq->rq_flags & RQF_ELV))
- plug->has_elevator = true;
- rq->rq_next = NULL;
- rq_list_add(&plug->mq_list, rq);
- plug->rq_count++;
-}
-
static bool blk_mq_attempt_bio_merge(struct request_queue *q,
struct bio *bio, unsigned int nr_segs)
{
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 3ed5eaf3446a..6ed602b2f80a 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -742,6 +742,7 @@ static void dd_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
if (at_head) {
list_add(&rq->queuelist, &per_prio->dispatch);
+ rq->fifo_time = jiffies;
} else {
deadline_add_rq_rb(per_prio, rq);
generated by cgit (git 2.34.1) at 2024-06-11 08:27:49 +0000