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blk-mq: Rename BLK_MQ_F_TAG_SHARED as BLK_MQ_F_TAG_QUEUE_SHARED 

BLK_MQ_F_TAG_SHARED actually means that tags is shared among request
queues, all of which should belong to LUNs attached to same HBA.

So rename it to make the point explicitly.

[jpg: rebase a few times, add rnbd-clt.c change]

Suggested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2020-08-19 23:20:19 +08:00 committed by Jens Axboe
parent de09077c89
commit 51db1c37ee
5 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/blk-mq-debugfs.c
View File

@ -240,7 +240,7 @@ static const char *const alloc_policy_name[] = {
#define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name
static const char *const hctx_flag_name[] = {
HCTX_FLAG_NAME(SHOULD_MERGE),
HCTX_FLAG_NAME(TAG_SHARED),
HCTX_FLAG_NAME(TAG_QUEUE_SHARED),
HCTX_FLAG_NAME(BLOCKING),
HCTX_FLAG_NAME(NO_SCHED),
HCTX_FLAG_NAME(STACKING),

6
block/blk-mq-tag.h
View File

@ -56,7 +56,7 @@ extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
{
if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
return false;
return __blk_mq_tag_busy(hctx);
@ -64,7 +64,7 @@ static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
{
if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
return;
__blk_mq_tag_idle(hctx);
@ -79,7 +79,7 @@ static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
{
unsigned int depth, users;
if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_SHARED))
if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
return true;
if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
return true;

20
block/blk-mq.c
View File

@ -1124,7 +1124,7 @@ static bool blk_mq_get_driver_tag(struct request *rq)
if (rq->tag == BLK_MQ_NO_TAG && !__blk_mq_get_driver_tag(rq))
return false;
if ((hctx->flags & BLK_MQ_F_TAG_SHARED) &&
if ((hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED) &&
!(rq->rq_flags & RQF_MQ_INFLIGHT)) {
rq->rq_flags |= RQF_MQ_INFLIGHT;
atomic_inc(&hctx->nr_active);
@ -1168,7 +1168,7 @@ static bool blk_mq_mark_tag_wait(struct blk_mq_hw_ctx *hctx,
wait_queue_entry_t *wait;
bool ret;
if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) {
if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) {
blk_mq_sched_mark_restart_hctx(hctx);
/*
@ -1420,7 +1420,7 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list,
bool needs_restart;
/* For non-shared tags, the RESTART check will suffice */
bool no_tag = prep == PREP_DISPATCH_NO_TAG &&
(hctx->flags & BLK_MQ_F_TAG_SHARED);
(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED);
bool no_budget_avail = prep == PREP_DISPATCH_NO_BUDGET;
blk_mq_release_budgets(q, nr_budgets);
@ -2668,7 +2668,7 @@ blk_mq_alloc_hctx(struct request_queue *q, struct blk_mq_tag_set *set,
spin_lock_init(&hctx->lock);
INIT_LIST_HEAD(&hctx->dispatch);
hctx->queue = q;
hctx->flags = set->flags & ~BLK_MQ_F_TAG_SHARED;
hctx->flags = set->flags & ~BLK_MQ_F_TAG_QUEUE_SHARED;
INIT_LIST_HEAD(&hctx->hctx_list);
@ -2885,9 +2885,9 @@ static void queue_set_hctx_shared(struct request_queue *q, bool shared)
queue_for_each_hw_ctx(q, hctx, i) {
if (shared)
hctx->flags |= BLK_MQ_F_TAG_SHARED;
hctx->flags |= BLK_MQ_F_TAG_QUEUE_SHARED;
else
hctx->flags &= ~BLK_MQ_F_TAG_SHARED;
hctx->flags &= ~BLK_MQ_F_TAG_QUEUE_SHARED;
}
}
@ -2913,7 +2913,7 @@ static void blk_mq_del_queue_tag_set(struct request_queue *q)
list_del(&q->tag_set_list);
if (list_is_singular(&set->tag_list)) {
/* just transitioned to unshared */
set->flags &= ~BLK_MQ_F_TAG_SHARED;
set->flags &= ~BLK_MQ_F_TAG_QUEUE_SHARED;
/* update existing queue */
blk_mq_update_tag_set_depth(set, false);
}
@ -2930,12 +2930,12 @@ static void blk_mq_add_queue_tag_set(struct blk_mq_tag_set *set,
* Check to see if we're transitioning to shared (from 1 to 2 queues).
*/
if (!list_empty(&set->tag_list) &&
!(set->flags & BLK_MQ_F_TAG_SHARED)) {
set->flags |= BLK_MQ_F_TAG_SHARED;
!(set->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) {
set->flags |= BLK_MQ_F_TAG_QUEUE_SHARED;
/* update existing queue */
blk_mq_update_tag_set_depth(set, true);
}
if (set->flags & BLK_MQ_F_TAG_SHARED)
if (set->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
queue_set_hctx_shared(q, true);
list_add_tail(&q->tag_set_list, &set->tag_list);

2
drivers/block/rnbd/rnbd-clt.c
View File

@ -1174,7 +1174,7 @@ static int setup_mq_tags(struct rnbd_clt_session *sess)
tag_set->queue_depth = sess->queue_depth;
tag_set->numa_node = NUMA_NO_NODE;
tag_set->flags = BLK_MQ_F_SHOULD_MERGE |
BLK_MQ_F_TAG_SHARED;
BLK_MQ_F_TAG_QUEUE_SHARED;
tag_set->cmd_size = sizeof(struct rnbd_iu);
tag_set->nr_hw_queues = num_online_cpus();

2
include/linux/blk-mq.h
View File

@ -378,7 +378,7 @@ struct blk_mq_ops {
enum {
BLK_MQ_F_SHOULD_MERGE = 1 << 0,
BLK_MQ_F_TAG_SHARED = 1 << 1,
BLK_MQ_F_TAG_QUEUE_SHARED = 1 << 1,
/*
* Set when this device requires underlying blk-mq device for
* completing IO: