From 15e3d2c5cd53298272e59ad9072d3468f9dd3781 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 24 Nov 2020 09:34:00 +0100 Subject: block: move disk stat accounting to struct block_device Move the dkstats and stamp field to struct block_device in preparation of killing struct hd_struct. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe --- block/blk-cgroup.c | 2 +- block/blk-core.c | 4 ++-- block/blk.h | 1 - block/genhd.c | 14 ++++---------- block/partitions/core.c | 9 +-------- 5 files changed, 8 insertions(+), 22 deletions(-) (limited to 'block') diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index ad02289a4f7f..79aa96240cec 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -830,7 +830,7 @@ static void blkcg_fill_root_iostats(void) for_each_possible_cpu(cpu) { struct disk_stats *cpu_dkstats; - cpu_dkstats = per_cpu_ptr(part->dkstats, cpu); + cpu_dkstats = per_cpu_ptr(part->bdev->bd_stats, cpu); tmp.ios[BLKG_IOSTAT_READ] += cpu_dkstats->ios[STAT_READ]; tmp.ios[BLKG_IOSTAT_WRITE] += diff --git a/block/blk-core.c b/block/blk-core.c index 988f45094a38..d2c9cb24e087 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1264,9 +1264,9 @@ static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end) { unsigned long stamp; again: - stamp = READ_ONCE(part->stamp); + stamp = READ_ONCE(part->bdev->bd_stamp); if (unlikely(stamp != now)) { - if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) + if (likely(cmpxchg(&part->bdev->bd_stamp, stamp, now) == stamp)) __part_stat_add(part, io_ticks, end ? now - stamp : 1); } if (part->partno) { diff --git a/block/blk.h b/block/blk.h index 09cee7024fb4..3f801f6e86f8 100644 --- a/block/blk.h +++ b/block/blk.h @@ -381,7 +381,6 @@ static inline void hd_struct_put(struct hd_struct *part) static inline void hd_free_part(struct hd_struct *part) { - free_percpu(part->dkstats); kfree(part->info); bdput(part->bdev); percpu_ref_exit(&part->ref); diff --git a/block/genhd.c b/block/genhd.c index c65f485b9db5..2cbda8139556 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -112,7 +112,7 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat) memset(stat, 0, sizeof(struct disk_stats)); for_each_possible_cpu(cpu) { - struct disk_stats *ptr = per_cpu_ptr(part->dkstats, cpu); + struct disk_stats *ptr = per_cpu_ptr(part->bdev->bd_stats, cpu); int group; for (group = 0; group < NR_STAT_GROUPS; group++) { @@ -891,7 +891,7 @@ void del_gendisk(struct gendisk *disk) kobject_put(disk->slave_dir); part_stat_set_all(&disk->part0, 0); - disk->part0.stamp = 0; + disk->part0.bdev->bd_stamp = 0; if (!sysfs_deprecated) sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); pm_runtime_set_memalloc_noio(disk_to_dev(disk), false); @@ -1628,19 +1628,15 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) if (!disk->part0.bdev) goto out_free_disk; - disk->part0.dkstats = alloc_percpu(struct disk_stats); - if (!disk->part0.dkstats) - goto out_bdput; - disk->node_id = node_id; if (disk_expand_part_tbl(disk, 0)) - goto out_free_bdstats; + goto out_bdput; ptbl = rcu_dereference_protected(disk->part_tbl, 1); rcu_assign_pointer(ptbl->part[0], &disk->part0); if (hd_ref_init(&disk->part0)) - goto out_free_bdstats; + goto out_bdput; disk->minors = minors; rand_initialize_disk(disk); @@ -1649,8 +1645,6 @@ struct gendisk *__alloc_disk_node(int minors, int node_id) device_initialize(disk_to_dev(disk)); return disk; -out_free_bdstats: - free_percpu(disk->part0.dkstats); out_bdput: bdput(disk->part0.bdev); out_free_disk: diff --git a/block/partitions/core.c b/block/partitions/core.c index bcfa8215bd5e..8924e1ea8b2a 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -409,14 +409,9 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno, if (!p) return ERR_PTR(-EBUSY); - err = -ENOMEM; - p->dkstats = alloc_percpu(struct disk_stats); - if (!p->dkstats) - goto out_free; - bdev = bdev_alloc(disk, partno); if (!bdev) - goto out_free_stats; + goto out_free; p->bdev = bdev; pdev = part_to_dev(p); @@ -490,8 +485,6 @@ out_free_info: kfree(p->info); out_bdput: bdput(bdev); -out_free_stats: - free_percpu(p->dkstats); out_free: kfree(p); return ERR_PTR(err); -- cgit v1.2.3