Now we have the tags available in __blk_mq_alloc_requests_batch(), we
can start fetching the first request cacheline before calling into the
request initialization.
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
block/blk-mq.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index fbaecb6e6dd4..77c2c3220128 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -389,6 +389,7 @@ __blk_mq_alloc_requests_batch(struct blk_mq_alloc_data *data,
for (i = 0; tag_mask; i++) {
if (!(tag_mask & (1UL << i)))
continue;
+ prefetch(tags->static_rqs[tag]);
tag = tag_offset + i;
tag_mask &= ~(1UL << i);
rq = blk_mq_rq_ctx_init(data, tags, tag, alloc_time_ns);
--
2.33.1
