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blk-mq: Refactor and rename blk_mq_free_map_and_{requests->rqs}() 

Refactor blk_mq_free_map_and_requests() such that it can be used at many
sites at which the tag map and rqs are freed.

Also rename to blk_mq_free_map_and_rqs(), which is shorter and matches the
alloc equivalent.

Suggested-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/1633429419-228500-12-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry 2021-10-05 18:23:36 +08:00 committed by Jens Axboe
parent 63064be150
commit 645db34e50
3 changed files with 28 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
block/blk-mq-tag.c
View File

@ -607,8 +607,7 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
if (!new)
return -ENOMEM;
blk_mq_free_rqs(set, *tagsptr, hctx->queue_num);
blk_mq_free_rq_map(*tagsptr, set->flags);
blk_mq_free_map_and_rqs(set, *tagsptr, hctx->queue_num);
*tagsptr = new;
} else {
/*

40
block/blk-mq.c
View File

@ -2887,15 +2887,15 @@ static bool __blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set,
return set->tags[hctx_idx];
}
static void blk_mq_free_map_and_requests(struct blk_mq_tag_set *set,
unsigned int hctx_idx)
void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set,
struct blk_mq_tags *tags,
unsigned int hctx_idx)
{
unsigned int flags = set->flags;
if (set->tags && set->tags[hctx_idx]) {
blk_mq_free_rqs(set, set->tags[hctx_idx], hctx_idx);
blk_mq_free_rq_map(set->tags[hctx_idx], flags);
set->tags[hctx_idx] = NULL;
if (tags) {
blk_mq_free_rqs(set, tags, hctx_idx);
blk_mq_free_rq_map(tags, flags);
}
}
@ -2976,8 +2976,10 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* fallback in case of a new remap fails
* allocation
*/
if (i && set->tags[i])
blk_mq_free_map_and_requests(set, i);
if (i && set->tags[i]) {
blk_mq_free_map_and_rqs(set, set->tags[i], i);
set->tags[i] = NULL;
}
hctx->tags = NULL;
continue;
@ -3273,8 +3275,8 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
struct blk_mq_hw_ctx *hctx = hctxs[j];
if (hctx) {
if (hctx->tags)
blk_mq_free_map_and_requests(set, j);
blk_mq_free_map_and_rqs(set, set->tags[j], j);
set->tags[j] = NULL;
blk_mq_exit_hctx(q, set, hctx, j);
hctxs[j] = NULL;
}
@ -3370,8 +3372,10 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
return 0;
out_unwind:
while (--i >= 0)
blk_mq_free_map_and_requests(set, i);
while (--i >= 0) {
blk_mq_free_map_and_rqs(set, set->tags[i], i);
set->tags[i] = NULL;
}
return -ENOMEM;
}
@ -3566,8 +3570,10 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
return 0;
out_free_mq_rq_maps:
for (i = 0; i < set->nr_hw_queues; i++)
blk_mq_free_map_and_requests(set, i);
for (i = 0; i < set->nr_hw_queues; i++) {
blk_mq_free_map_and_rqs(set, set->tags[i], i);
set->tags[i] = NULL;
}
out_free_mq_map:
for (i = 0; i < set->nr_maps; i++) {
kfree(set->map[i].mq_map);
@ -3599,8 +3605,10 @@ void blk_mq_free_tag_set(struct blk_mq_tag_set *set)
{
int i, j;
for (i = 0; i < set->nr_hw_queues; i++)
blk_mq_free_map_and_requests(set, i);
for (i = 0; i < set->nr_hw_queues; i++) {
blk_mq_free_map_and_rqs(set, set->tags[i], i);
set->tags[i] = NULL;
}
if (blk_mq_is_sbitmap_shared(set->flags))
blk_mq_exit_shared_sbitmap(set);

4
block/blk-mq.h
View File

@ -57,7 +57,9 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
void blk_mq_free_rq_map(struct blk_mq_tags *tags, unsigned int flags);
struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set,
unsigned int hctx_idx, unsigned int depth);
void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set,
struct blk_mq_tags *tags,
unsigned int hctx_idx);
/*
* Internal helpers for request insertion into sw queues
*/