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authorOmar Sandoval <osandov@fb.com>2016-09-17 01:28:24 -0700
committerJens Axboe <axboe@fb.com>2016-09-17 08:39:12 -0600
commitf4a644db86669d938c71f19560aebf69d4720d63 (patch)
tree9a3f2df232414fdeae47881639ed1ed77406198a /block
parent40aabb67464d5aad9ca3d2a5fedee56e2ff45aa0 (diff)
downloadlinux-f4a644db86669d938c71f19560aebf69d4720d63.tar.bz2
sbitmap: push alloc policy into sbitmap_queue
Again, there's no point in passing this in every time. Make it part of struct sbitmap_queue and clean up the API. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq-tag.c33
-rw-r--r--block/blk-mq-tag.h1
2 files changed, 15 insertions, 19 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index c9a22dbbbda1..e1c2bedb0bf9 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -91,14 +91,11 @@ static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
return atomic_read(&hctx->nr_active) < depth;
}
-#define BT_ALLOC_RR(tags) (tags->alloc_policy == BLK_TAG_ALLOC_RR)
-
-static int __bt_get(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
- struct blk_mq_tags *tags)
+static int __bt_get(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt)
{
if (!hctx_may_queue(hctx, bt))
return -1;
- return __sbitmap_queue_get(bt, BT_ALLOC_RR(tags));
+ return __sbitmap_queue_get(bt);
}
static int bt_get(struct blk_mq_alloc_data *data, struct sbitmap_queue *bt,
@@ -108,7 +105,7 @@ static int bt_get(struct blk_mq_alloc_data *data, struct sbitmap_queue *bt,
DEFINE_WAIT(wait);
int tag;
- tag = __bt_get(hctx, bt, tags);
+ tag = __bt_get(hctx, bt);
if (tag != -1)
return tag;
@@ -119,7 +116,7 @@ static int bt_get(struct blk_mq_alloc_data *data, struct sbitmap_queue *bt,
do {
prepare_to_wait(&ws->wait, &wait, TASK_UNINTERRUPTIBLE);
- tag = __bt_get(hctx, bt, tags);
+ tag = __bt_get(hctx, bt);
if (tag != -1)
break;
@@ -136,7 +133,7 @@ static int bt_get(struct blk_mq_alloc_data *data, struct sbitmap_queue *bt,
* Retry tag allocation after running the hardware queue,
* as running the queue may also have found completions.
*/
- tag = __bt_get(hctx, bt, tags);
+ tag = __bt_get(hctx, bt);
if (tag != -1)
break;
@@ -206,12 +203,10 @@ void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
const int real_tag = tag - tags->nr_reserved_tags;
BUG_ON(real_tag >= tags->nr_tags);
- sbitmap_queue_clear(&tags->bitmap_tags, real_tag,
- BT_ALLOC_RR(tags), ctx->cpu);
+ sbitmap_queue_clear(&tags->bitmap_tags, real_tag, ctx->cpu);
} else {
BUG_ON(tag >= tags->nr_reserved_tags);
- sbitmap_queue_clear(&tags->breserved_tags, tag,
- BT_ALLOC_RR(tags), ctx->cpu);
+ sbitmap_queue_clear(&tags->breserved_tags, tag, ctx->cpu);
}
}
@@ -363,21 +358,23 @@ static unsigned int bt_unused_tags(const struct sbitmap_queue *bt)
return bt->sb.depth - sbitmap_weight(&bt->sb);
}
-static int bt_alloc(struct sbitmap_queue *bt, unsigned int depth, int node)
+static int bt_alloc(struct sbitmap_queue *bt, unsigned int depth,
+ bool round_robin, int node)
{
- return sbitmap_queue_init_node(bt, depth, -1, GFP_KERNEL, node);
+ return sbitmap_queue_init_node(bt, depth, -1, round_robin, GFP_KERNEL,
+ node);
}
static struct blk_mq_tags *blk_mq_init_bitmap_tags(struct blk_mq_tags *tags,
int node, int alloc_policy)
{
unsigned int depth = tags->nr_tags - tags->nr_reserved_tags;
+ bool round_robin = alloc_policy == BLK_TAG_ALLOC_RR;
- tags->alloc_policy = alloc_policy;
-
- if (bt_alloc(&tags->bitmap_tags, depth, node))
+ if (bt_alloc(&tags->bitmap_tags, depth, round_robin, node))
goto free_tags;
- if (bt_alloc(&tags->breserved_tags, tags->nr_reserved_tags, node))
+ if (bt_alloc(&tags->breserved_tags, tags->nr_reserved_tags, round_robin,
+ node))
goto free_bitmap_tags;
return tags;
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 2b1d52ed82e0..f90b850ce43d 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -18,7 +18,6 @@ struct blk_mq_tags {
struct request **rqs;
struct list_head page_list;
- int alloc_policy;
cpumask_var_t cpumask;
};