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 <[email protected]> --- 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 -- dm-devel mailing list [email protected] https://listman.redhat.com/mailman/listinfo/dm-devel
