blk_mq_tags/requests of specific hardware queue are mostly used in
specific cpus, which might not be in the same numa node as disk. For
example, a nvme card is in node 0. half hardware queue will be used by
node 0, the other node 1.
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
block/blk-mq.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index ec214d3..2e37c28 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1465,9 +1465,15 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set,
struct blk_mq_tags *tags;
unsigned int i, j, entries_per_page, max_order = 4;
size_t rq_size, left;
+ int node;
+
+ node = blk_mq_estimate_hw_queue_node(set->nr_hw_queues,
+ hctx_idx);
+ if (node == NUMA_NO_NODE)
+ node = set->numa_node;
tags = blk_mq_init_tags(set->queue_depth, set->reserved_tags,
- set->numa_node,
+ node,
BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags));
if (!tags)
return NULL;
@@ -1476,7 +1482,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set,
tags->rqs = kzalloc_node(set->queue_depth * sizeof(struct request *),
GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY,
- set->numa_node);
+ node);
if (!tags->rqs) {
blk_mq_free_tags(tags);
return NULL;
@@ -1500,7 +1506,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set,
this_order--;
do {
- page = alloc_pages_node(set->numa_node,
+ page = alloc_pages_node(node,
GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY | __GFP_ZERO,
this_order);
if (page)
@@ -1531,7 +1537,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set,
if (set->ops->init_request) {
if (set->ops->init_request(set->driver_data,
tags->rqs[i], hctx_idx, i,
- set->numa_node)) {
+ node)) {
tags->rqs[i] = NULL;
goto fail;
}
--
2.8.0.rc2
--
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