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Merge tag 'block-5.18-2022-04-29' of git://git.kernel.dk/linux-block

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Pull block fixes from Jens Axboe:

 - Revert of a patch that caused timestamp issues (Tejun)

 - iocost warning fix (Tejun)

 - bfq warning fix (Jan)

* tag 'block-5.18-2022-04-29' of git://git.kernel.dk/linux-block:
  bfq: Fix warning in bfqq_request_over_limit()
  Revert "block: inherit request start time from bio for BLK_CGROUP"
  iocost: don't reset the inuse weight of under-weighted debtors
This commit is contained in:
Linus Torvalds
2022-04-29 15:28:42 -07:00
parent 63b7b3ea94 09df6a75ff
commit bd3d3adea9
3 changed files with 21 additions and 12 deletions
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12
block/bfq-iosched.c
View File

@@ -569,7 +569,7 @@ 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;
@@ -578,15 +578,21 @@ 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;

12
block/blk-iocost.c
View File

@@ -2322,7 +2322,17 @@ 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);

9
block/blk-mq.c
View File

@@ -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);