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blk-cgroup: pass a gendisk to blkcg_schedule_throttle

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Pass the gendisk to blkcg_schedule_throttle as part of moving the
blk-cgroup infrastructure to be gendisk based.  Remove the unused
!BLK_CGROUP stub while we're at it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Herrmann <aherrmann@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220921180501.1539876-17-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-09-21 20:05:00 +02:00 committed by Jens Axboe
parent 00ad6991bb
commit de185b56e8
5 changed files with 11 additions and 10 deletions
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8
block/blk-cgroup.c
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@ -1792,13 +1792,13 @@ void blkcg_maybe_throttle_current(void)
/**
* blkcg_schedule_throttle - this task needs to check for throttling
* @q: the request queue IO was submitted on
* @gendisk: disk to throttle
* @use_memdelay: do we charge this to memory delay for PSI
*
* This is called by the IO controller when we know there's delay accumulated
* for the blkg for this task. We do not pass the blkg because there are places
* we call this that may not have that information, the swapping code for
* instance will only have a request_queue at that point. This set's the
* instance will only have a block_device at that point. This set's the
* notify_resume for the task to check and see if it requires throttling before
* returning to user space.
*
@ -1807,8 +1807,10 @@ void blkcg_maybe_throttle_current(void)
* throttle once. If the task needs to be throttled again it'll need to be
* re-set at the next time we see the task.
*/
void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay)
void blkcg_schedule_throttle(struct gendisk *disk, bool use_memdelay)
{
struct request_queue *q = disk->queue;
if (unlikely(current->flags & PF_KTHREAD))
return;

4
block/blk-iocost.c
View File

@ -2636,7 +2636,7 @@ static void ioc_rqos_throttle(struct rq_qos *rqos, struct bio *bio)
if (use_debt) {
iocg_incur_debt(iocg, abs_cost, &now);
if (iocg_kick_delay(iocg, &now))
blkcg_schedule_throttle(rqos->q,
blkcg_schedule_throttle(rqos->q->disk,
(bio->bi_opf & REQ_SWAP) == REQ_SWAP);
iocg_unlock(iocg, ioc_locked, &flags);
return;
@ -2737,7 +2737,7 @@ static void ioc_rqos_merge(struct rq_qos *rqos, struct request *rq,
if (likely(!list_empty(&iocg->active_list))) {
iocg_incur_debt(iocg, abs_cost, &now);
if (iocg_kick_delay(iocg, &now))
blkcg_schedule_throttle(rqos->q,
blkcg_schedule_throttle(rqos->q->disk,
(bio->bi_opf & REQ_SWAP) == REQ_SWAP);
} else {
iocg_commit_bio(iocg, bio, abs_cost, cost);

2
block/blk-iolatency.c
View File

@ -292,7 +292,7 @@ static void __blkcg_iolatency_throttle(struct rq_qos *rqos,
unsigned use_delay = atomic_read(&lat_to_blkg(iolat)->use_delay);
if (use_delay)
blkcg_schedule_throttle(rqos->q, use_memdelay);
blkcg_schedule_throttle(rqos->q->disk, use_memdelay);
/*
* To avoid priority inversions we want to just take a slot if we are

5
include/linux/blk-cgroup.h
View File

@ -18,14 +18,14 @@
struct bio;
struct cgroup_subsys_state;
struct request_queue;
struct gendisk;
#define FC_APPID_LEN 129
#ifdef CONFIG_BLK_CGROUP
extern struct cgroup_subsys_state * const blkcg_root_css;
void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay);
void blkcg_schedule_throttle(struct gendisk *disk, bool use_memdelay);
void blkcg_maybe_throttle_current(void);
bool blk_cgroup_congested(void);
void blkcg_pin_online(struct cgroup_subsys_state *blkcg_css);
@ -39,7 +39,6 @@ struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio);
static inline void blkcg_maybe_throttle_current(void) { }
static inline bool blk_cgroup_congested(void) { return false; }
static inline void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay) { }
static inline struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio)
{
return NULL;

2
mm/swapfile.c
View File

@ -3655,7 +3655,7 @@ void __cgroup_throttle_swaprate(struct page *page, gfp_t gfp_mask)
plist_for_each_entry_safe(si, next, &swap_avail_heads[nid],
avail_lists[nid]) {
if (si->bdev) {
blkcg_schedule_throttle(bdev_get_queue(si->bdev), true);
blkcg_schedule_throttle(si->bdev->bd_disk, true);
break;
}
}