From 42ee3061293e206bc0f3a084feea1304c61c137a Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Tue, 8 Mar 2022 15:32:16 +0800 Subject: [PATCH] blk-mq: reconfigure poll after queue map is changed queue map can be changed when updating nr_hw_queues, so we need to reconfigure queue's poll capability. Add one helper for doing this job. Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20220308073219.91173-4-ming.lei@redhat.com Signed-off-by: Jens Axboe --- block/blk-mq.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 64fddb3..57ae9df 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -4010,6 +4010,17 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set, mutex_unlock(&q->sysfs_lock); } +static void blk_mq_update_poll_flag(struct request_queue *q) +{ + struct blk_mq_tag_set *set = q->tag_set; + + if (set->nr_maps > HCTX_TYPE_POLL && + set->map[HCTX_TYPE_POLL].nr_queues) + blk_queue_flag_set(QUEUE_FLAG_POLL, q); + else + blk_queue_flag_clear(QUEUE_FLAG_POLL, q); +} + int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, struct request_queue *q) { @@ -4044,9 +4055,7 @@ int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, q->tag_set = set; q->queue_flags |= QUEUE_FLAG_MQ_DEFAULT; - if (set->nr_maps > HCTX_TYPE_POLL && - set->map[HCTX_TYPE_POLL].nr_queues) - blk_queue_flag_set(QUEUE_FLAG_POLL, q); + blk_mq_update_poll_flag(q); INIT_DELAYED_WORK(&q->requeue_work, blk_mq_requeue_work); INIT_LIST_HEAD(&q->requeue_list); @@ -4512,6 +4521,7 @@ fallback: blk_mq_update_queue_map(set); list_for_each_entry(q, &set->tag_list, tag_set_list) { blk_mq_realloc_hw_ctxs(set, q); + blk_mq_update_poll_flag(q); if (q->nr_hw_queues != set->nr_hw_queues) { int i = prev_nr_hw_queues; -- 2.7.4