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| author | Christoph Hellwig <hch@lst.de> | 2023-02-03 16:03:43 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-02-03 08:20:04 -0700 |
| commit | 178fa7d49815ea8001f43ade37a22072829fd8ab (patch) | |
| tree | a27898ff8fedf946256c22264c8fb9d05371858d /block/genhd.c | |
| parent | a886001c2da8dd02357d0d336ddb021903347f89 (diff) | |
| download | linux-riscv-178fa7d49815ea8001f43ade37a22072829fd8ab.tar.gz linux-riscv-178fa7d49815ea8001f43ade37a22072829fd8ab.tar.bz2 linux-riscv-178fa7d49815ea8001f43ade37a22072829fd8ab.zip | |
blk-cgroup: delay blk-cgroup initialization until add_disk
There is no need to initialize the cgroup code before the disk is marked
live. Moving the cgroup initialization earlier will help to have a
fully initialized struct device in the gendisk for the cgroup code to
use in the future. Similarly tear the cgroup information down in
del_gendisk to be symmetric and because none of the cgroup tracking is
needed once non-passthrough I/O stops.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Herrmann <aherrmann@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230203150400.3199230-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/block/genhd.c b/block/genhd.c index 23cf83b3331c..705dec0800d6 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -466,10 +466,14 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk, */ pm_runtime_set_memalloc_noio(ddev, true); - ret = blk_integrity_add(disk); + ret = blkcg_init_disk(disk); if (ret) goto out_del_block_link; + ret = blk_integrity_add(disk); + if (ret) + goto out_blkcg_exit; + disk->part0->bd_holder_dir = kobject_create_and_add("holders", &ddev->kobj); if (!disk->part0->bd_holder_dir) { @@ -534,6 +538,8 @@ out_put_holder_dir: kobject_put(disk->part0->bd_holder_dir); out_del_integrity: blk_integrity_del(disk); +out_blkcg_exit: + blkcg_exit_disk(disk); out_del_block_link: if (!sysfs_deprecated) sysfs_remove_link(block_depr, dev_name(ddev)); @@ -662,6 +668,8 @@ void del_gendisk(struct gendisk *disk) rq_qos_exit(q); blk_mq_unquiesce_queue(q); + blkcg_exit_disk(disk); + /* * If the disk does not own the queue, allow using passthrough requests * again. Else leave the queue frozen to fail all I/O. @@ -1171,8 +1179,6 @@ static void disk_release(struct device *dev) !test_bit(GD_ADDED, &disk->state)) blk_mq_exit_queue(disk->queue); - blkcg_exit_disk(disk); - bioset_exit(&disk->bio_split); disk_release_events(disk); @@ -1385,9 +1391,6 @@ struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, if (xa_insert(&disk->part_tbl, 0, disk->part0, GFP_KERNEL)) goto out_destroy_part_tbl; - if (blkcg_init_disk(disk)) - goto out_erase_part0; - rand_initialize_disk(disk); disk_to_dev(disk)->class = &block_class; disk_to_dev(disk)->type = &disk_type; @@ -1400,8 +1403,6 @@ struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, #endif return disk; -out_erase_part0: - xa_erase(&disk->part_tbl, 0); out_destroy_part_tbl: xa_destroy(&disk->part_tbl); disk->part0->bd_disk = NULL; |