From 6f8191fdf41d3a53cc1d63fe2234e812c55a0092 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jun 2022 08:05:51 +0200 Subject: block: simplify disk shutdown Set the queue dying flag and call blk_mq_exit_queue from del_gendisk for all disks that do not have separately allocated queues, and thus remove the need to call blk_cleanup_queue for them. Rename blk_cleanup_disk to blk_mq_destroy_queue to make it clear that this function is intended only for separately allocated blk-mq queues. This saves an extra queue freeze for devices without a separately allocated queue. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20220619060552.1850436-6-hch@lst.de Signed-off-by: Jens Axboe --- block/genhd.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index 278227ba1d53..4d15f828c449 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -617,6 +617,8 @@ void del_gendisk(struct gendisk *disk) * Fail any new I/O. */ set_bit(GD_DEAD, &disk->state); + if (test_bit(GD_OWNS_QUEUE, &disk->state)) + blk_queue_flag_set(QUEUE_FLAG_DYING, q); set_capacity(disk, 0); /* @@ -663,11 +665,16 @@ void del_gendisk(struct gendisk *disk) blk_mq_unquiesce_queue(q); /* - * Allow using passthrough request again after the queue is torn down. + * If the disk does not own the queue, allow using passthrough requests + * again. Else leave the queue frozen to fail all I/O. */ - blk_queue_flag_clear(QUEUE_FLAG_INIT_DONE, q); - __blk_mq_unfreeze_queue(q, true); - + if (!test_bit(GD_OWNS_QUEUE, &disk->state)) { + blk_queue_flag_clear(QUEUE_FLAG_INIT_DONE, q); + __blk_mq_unfreeze_queue(q, true); + } else { + if (queue_is_mq(q)) + blk_mq_exit_queue(q); + } } EXPORT_SYMBOL(del_gendisk); @@ -1338,9 +1345,6 @@ struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, { struct gendisk *disk; - if (!blk_get_queue(q)) - return NULL; - disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id); if (!disk) goto out_put_queue; @@ -1391,7 +1395,6 @@ out_put_queue: blk_put_queue(q); return NULL; } -EXPORT_SYMBOL(__alloc_disk_node); struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass) { @@ -1404,9 +1407,10 @@ struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass) disk = __alloc_disk_node(q, node, lkclass); if (!disk) { - blk_cleanup_queue(q); + blk_put_queue(q); return NULL; } + set_bit(GD_OWNS_QUEUE, &disk->state); return disk; } EXPORT_SYMBOL(__blk_alloc_disk); @@ -1439,7 +1443,6 @@ EXPORT_SYMBOL(put_disk); */ void blk_cleanup_disk(struct gendisk *disk) { - blk_cleanup_queue(disk->queue); put_disk(disk); } EXPORT_SYMBOL(blk_cleanup_disk); -- cgit v1.2.1