Add one helper for creating io context and prepare for supporting
efficient bio based io poll.
Meantime move the code of creating io_context before checking bio's
REQ_HIPRI flag because the following patch may change to clear REQ_HIPRI
if io_context can't be created.
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
block/blk-core.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index a31371d55b9d..d58f8a0c80de 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -792,6 +792,18 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q,
return BLK_STS_OK;
}
+static inline void blk_create_io_context(struct request_queue *q)
+{
+ /*
+ * Various block parts want %current->io_context, so allocate it up
+ * front rather than dealing with lots of pain to allocate it only
+ * where needed. This may fail and the block layer knows how to live
+ * with it.
+ */
+ if (unlikely(!current->io_context))
+ create_task_io_context(current, GFP_ATOMIC, q->node);
+}
+
static noinline_for_stack bool submit_bio_checks(struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
@@ -836,6 +848,8 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio)
}
}
+ blk_create_io_context(q);
+
if (!blk_queue_poll(q))
bio->bi_opf &= ~REQ_HIPRI;
@@ -876,15 +890,6 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio)
break;
}
- /*
- * Various block parts want %current->io_context, so allocate it up
- * front rather than dealing with lots of pain to allocate it only
- * where needed. This may fail and the block layer knows how to live
- * with it.
- */
- if (unlikely(!current->io_context))
- create_task_io_context(current, GFP_ATOMIC, q->node);
-
if (blk_throtl_bio(bio)) {
blkcg_bio_issue_init(bio);
return false;
--
2.29.2
