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for-linus-20190323 

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Merge tag 'for-linus-20190323' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A set of fixes/changes that should go into this series. This contains:

   - Kernel doc / comment updates (Bart, Shenghui)

   - Un-export of core-only used function (Bart)

   - Fix race on loop file access (Dongli)

   - pf/pcd queue cleanup fixes (me)

   - Use appropriate helper for RESTART bit set (Yufen)

   - Use named identifier for classic poll (Yufen)"

* tag 'for-linus-20190323' of git://git.kernel.dk/linux-block:
  sbitmap: trivial - update comment for sbitmap_deferred_clear_bit
  blkcg: Fix kernel-doc warnings
  blk-iolatency: #include "blk.h"
  block: Unexport blk_mq_add_to_requeue_list()
  block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value
  blk-mq: remove unused 'nr_expired' from blk_mq_hw_ctx
  loop: access lo_backing_file only when the loop device is Lo_bound
  blk-mq: use blk_mq_sched_mark_restart_hctx to set RESTART
  paride/pcd: cleanup queues when detection fails
  paride/pf: cleanup queues when detection fails
This commit is contained in:
Linus Torvalds 2019-03-23 10:14:42 -07:00
parent 9a1050ad83 1e4471e74c
commit 2335cbe648
11 changed files with 39 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
block/blk-cgroup.c
View File

@ -1736,8 +1736,8 @@ void blkcg_maybe_throttle_current(void)
/**
* blkcg_schedule_throttle - this task needs to check for throttling
* @q - the request queue IO was submitted on
* @use_memdelay - do we charge this to memory delay for PSI
* @q: the request queue IO was submitted on
* @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
@ -1769,8 +1769,9 @@ void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay)
/**
* blkcg_add_delay - add delay to this blkg
* @now - the current time in nanoseconds
* @delta - how many nanoseconds of delay to add
* @blkg: blkg of interest
* @now: the current time in nanoseconds
* @delta: how many nanoseconds of delay to add
*
* Charge @delta to the blkg's current delay accumulation. This is used to
* throttle tasks if an IO controller thinks we need more throttling.

1
block/blk-iolatency.c
View File

@ -75,6 +75,7 @@
#include <linux/blk-mq.h>
#include "blk-rq-qos.h"
#include "blk-stat.h"
#include "blk.h"
#define DEFAULT_SCALE_COOKIE 1000000U

8
block/blk-mq.c
View File

@ -782,7 +782,6 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
if (kick_requeue_list)
blk_mq_kick_requeue_list(q);
}
EXPORT_SYMBOL(blk_mq_add_to_requeue_list);
void blk_mq_kick_requeue_list(struct request_queue *q)
{
@ -1093,8 +1092,7 @@ static bool blk_mq_mark_tag_wait(struct blk_mq_hw_ctx *hctx,
bool ret;
if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) {
if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
blk_mq_sched_mark_restart_hctx(hctx);
/*
* It's possible that a tag was freed in the window between the
@ -2857,7 +2855,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
/*
* Default to classic polling
*/
q->poll_nsec = -1;
q->poll_nsec = BLK_MQ_POLL_CLASSIC;
blk_mq_init_cpu_queues(q, set->nr_hw_queues);
blk_mq_add_queue_tag_set(set, q);
@ -3392,7 +3390,7 @@ static bool blk_mq_poll_hybrid(struct request_queue *q,
{
struct request *rq;
if (q->poll_nsec == -1)
if (q->poll_nsec == BLK_MQ_POLL_CLASSIC)
return false;
if (!blk_qc_t_is_internal(cookie))

2
block/blk-mq.h
View File

@ -41,6 +41,8 @@ void blk_mq_free_queue(struct request_queue *q);
int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
void blk_mq_wake_waiters(struct request_queue *q);
bool blk_mq_dispatch_rq_list(struct request_queue *, struct list_head *, bool);
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
bool kick_requeue_list);
void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list);
bool blk_mq_get_driver_tag(struct request *rq);
struct request *blk_mq_dequeue_from_ctx(struct blk_mq_hw_ctx *hctx,

12
block/blk-sysfs.c
View File

@ -360,8 +360,8 @@ static ssize_t queue_poll_delay_show(struct request_queue *q, char *page)
{
int val;
if (q->poll_nsec == -1)
val = -1;
if (q->poll_nsec == BLK_MQ_POLL_CLASSIC)
val = BLK_MQ_POLL_CLASSIC;
else
val = q->poll_nsec / 1000;
@ -380,10 +380,12 @@ static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page,
if (err < 0)
return err;
if (val == -1)
q->poll_nsec = -1;
else
if (val == BLK_MQ_POLL_CLASSIC)
q->poll_nsec = BLK_MQ_POLL_CLASSIC;
else if (val >= 0)
q->poll_nsec = val * 1000;
else
return -EINVAL;
return count;
}

2
drivers/block/loop.c
View File

@ -656,7 +656,7 @@ static int loop_validate_file(struct file *file, struct block_device *bdev)
return -EBADF;
l = f->f_mapping->host->i_bdev->bd_disk->private_data;
if (l->lo_state == Lo_unbound) {
if (l->lo_state != Lo_bound) {
return -EINVAL;
}
f = l->lo_backing_file;

6
drivers/block/paride/pcd.c
View File

@ -749,8 +749,12 @@ static int pcd_detect(void)
return 0;
printk("%s: No CD-ROM drive found\n", name);
for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
blk_cleanup_queue(cd->disk->queue);
cd->disk->queue = NULL;
blk_mq_free_tag_set(&cd->tag_set);
put_disk(cd->disk);
}
pi_unregister_driver(par_drv);
return -1;
}

16
drivers/block/paride/pf.c
View File

@ -761,8 +761,12 @@ static int pf_detect(void)
return 0;
printk("%s: No ATAPI disk detected\n", name);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++)
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
blk_cleanup_queue(pf->disk->queue);
pf->disk->queue = NULL;
blk_mq_free_tag_set(&pf->tag_set);
put_disk(pf->disk);
}
pi_unregister_driver(par_drv);
return -1;
}
@ -1047,13 +1051,15 @@ static void __exit pf_exit(void)
int unit;
unregister_blkdev(major, name);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
if (!pf->present)
continue;
del_gendisk(pf->disk);
if (pf->present)
del_gendisk(pf->disk);
blk_cleanup_queue(pf->disk->queue);
blk_mq_free_tag_set(&pf->tag_set);
put_disk(pf->disk);
pi_release(pf->pi);
if (pf->present)
pi_release(pf->pi);
}
}

3
include/linux/blk-mq.h
View File

@ -57,7 +57,6 @@ struct blk_mq_hw_ctx {
unsigned int queue_num;
atomic_t nr_active;
unsigned int nr_expired;
struct hlist_node cpuhp_dead;
struct kobject kobj;
@ -300,8 +299,6 @@ void blk_mq_end_request(struct request *rq, blk_status_t error);
void __blk_mq_end_request(struct request *rq, blk_status_t error);
void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list);
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
bool kick_requeue_list);
void blk_mq_kick_requeue_list(struct request_queue *q);
void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
bool blk_mq_complete_request(struct request *rq);

3
include/linux/blkdev.h
View File

@ -50,6 +50,9 @@ struct blk_stat_callback;
/* Must be consistent with blk_mq_poll_stats_bkt() */
#define BLK_MQ_POLL_STATS_BKTS 16
/* Doing classic polling */
#define BLK_MQ_POLL_CLASSIC -1
/*
* Maximum number of blkcg policies allowed to be registered concurrently.
* Defined here to simplify include dependency.

2
include/linux/sbitmap.h
View File

@ -330,7 +330,7 @@ static inline void sbitmap_clear_bit(struct sbitmap *sb, unsigned int bitnr)
/*
* This one is special, since it doesn't actually clear the bit, rather it
* sets the corresponding bit in the ->cleared mask instead. Paired with
* the caller doing sbitmap_batch_clear() if a given index is full, which
* the caller doing sbitmap_deferred_clear() if a given index is full, which
* will clear the previously freed entries in the corresponding ->word.
*/
static inline void sbitmap_deferred_clear_bit(struct sbitmap *sb, unsigned int bitnr)