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authorChristoph Hellwig <hch@lst.de>2016-09-14 17:18:59 +0300
committerJens Axboe <axboe@fb.com>2016-09-15 17:42:03 +0300
commit1b157939f92ae22d10b9d52baaa14f826927f5ff (patch)
tree8e0656c97a3d19bd8936e6484b91d03ed7965fac /block
parentb5af7f2ff022a75eb0bbf2166007c4b8ddd02ef1 (diff)
downloadlinux-1b157939f92ae22d10b9d52baaa14f826927f5ff.tar.xz
blk-mq: get rid of the cpumask in struct blk_mq_tags
Unused now that NVMe sets up irq affinity before calling into blk-mq. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq-tag.c6
-rw-r--r--block/blk-mq-tag.h1
-rw-r--r--block/blk-mq.c25
3 files changed, 21 insertions, 11 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 16028130289f..2eae3d5f7145 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -665,11 +665,6 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags,
if (!tags)
return NULL;
- if (!zalloc_cpumask_var(&tags->cpumask, GFP_KERNEL)) {
- kfree(tags);
- return NULL;
- }
-
tags->nr_tags = total_tags;
tags->nr_reserved_tags = reserved_tags;
@@ -680,7 +675,6 @@ void blk_mq_free_tags(struct blk_mq_tags *tags)
{
bt_free(&tags->bitmap_tags);
bt_free(&tags->breserved_tags);
- free_cpumask_var(tags->cpumask);
kfree(tags);
}
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index d468a79f2c4a..556964134d1c 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -44,7 +44,6 @@ struct blk_mq_tags {
struct list_head page_list;
int alloc_policy;
- cpumask_var_t cpumask;
};
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a3060078a8da..060b350d3f0c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1861,7 +1861,6 @@ static void blk_mq_map_swqueue(struct request_queue *q,
hctx->tags = set->tags[i];
WARN_ON(!hctx->tags);
- cpumask_copy(hctx->tags->cpumask, hctx->cpumask);
/*
* Set the map size to the number of mapped software queues.
* This is more accurate and more efficient than looping
@@ -2272,11 +2271,29 @@ static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
return 0;
}
-struct cpumask *blk_mq_tags_cpumask(struct blk_mq_tags *tags)
+static int blk_mq_create_mq_map(struct blk_mq_tag_set *set,
+ const struct cpumask *affinity_mask)
{
- return tags->cpumask;
+ int queue = -1, cpu = 0;
+
+ set->mq_map = kzalloc_node(sizeof(*set->mq_map) * nr_cpu_ids,
+ GFP_KERNEL, set->numa_node);
+ if (!set->mq_map)
+ return -ENOMEM;
+
+ if (!affinity_mask)
+ return 0; /* map all cpus to queue 0 */
+
+ /* If cpus are offline, map them to first hctx */
+ for_each_online_cpu(cpu) {
+ if (cpumask_test_cpu(cpu, affinity_mask))
+ queue++;
+ if (queue >= 0)
+ set->mq_map[cpu] = queue;
+ }
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(blk_mq_tags_cpumask);
/*
* Alloc a tag set to be associated with one or more request queues.