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btrfs: use normal workqueues for scrub

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All three scrub workqueues don't need ordered execution or thread
disabling threshold (as the thresh parameter is less than DFT_THRESHOLD).
Just switch to the normal workqueues that use a lot less resources,
especially in the work_struct vs btrfs_work structures.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2022-04-18 06:43:10 +02:00 committed by David Sterba
parent a31b4a4368
commit be53951826
3 changed files with 41 additions and 46 deletions
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6
fs/btrfs/ctree.h
View file

@ -946,9 +946,9 @@ struct btrfs_fs_info {
* running.
*/
refcount_t scrub_workers_refcnt;
struct btrfs_workqueue *scrub_workers;
struct btrfs_workqueue *scrub_wr_completion_workers;
struct btrfs_workqueue *scrub_parity_workers;
struct workqueue_struct *scrub_workers;
struct workqueue_struct *scrub_wr_completion_workers;
struct workqueue_struct *scrub_parity_workers;
struct btrfs_subpage_info *subpage_info;
struct btrfs_discard_ctl discard_ctl;

79
fs/btrfs/scrub.c
View file

@ -90,7 +90,7 @@ struct scrub_bio {
struct scrub_sector *sectors[SCRUB_SECTORS_PER_BIO];
int sector_count;
int next_free;
struct btrfs_work work;
struct work_struct work;
};
struct scrub_block {
@ -110,7 +110,7 @@ struct scrub_block {
/* It is for the data with checksum */
unsigned int data_corrected:1;
};
struct btrfs_work work;
struct work_struct work;
};
/* Used for the chunks with parity stripe such RAID5/6 */
@ -132,7 +132,7 @@ struct scrub_parity {
struct list_head sectors_list;
/* Work of parity check and repair */
struct btrfs_work work;
struct work_struct work;
/* Mark the parity blocks which have data */
unsigned long *dbitmap;
@ -231,7 +231,7 @@ static int scrub_sectors(struct scrub_ctx *sctx, u64 logical, u32 len,
u64 gen, int mirror_num, u8 *csum,
u64 physical_for_dev_replace);
static void scrub_bio_end_io(struct bio *bio);
static void scrub_bio_end_io_worker(struct btrfs_work *work);
static void scrub_bio_end_io_worker(struct work_struct *work);
static void scrub_block_complete(struct scrub_block *sblock);
static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
u64 extent_logical, u32 extent_len,
@ -242,7 +242,7 @@ static int scrub_add_sector_to_wr_bio(struct scrub_ctx *sctx,
struct scrub_sector *sector);
static void scrub_wr_submit(struct scrub_ctx *sctx);
static void scrub_wr_bio_end_io(struct bio *bio);
static void scrub_wr_bio_end_io_worker(struct btrfs_work *work);
static void scrub_wr_bio_end_io_worker(struct work_struct *work);
static void scrub_put_ctx(struct scrub_ctx *sctx);
static inline int scrub_is_page_on_raid56(struct scrub_sector *sector)
@ -587,8 +587,7 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
sbio->index = i;
sbio->sctx = sctx;
sbio->sector_count = 0;
btrfs_init_work(&sbio->work, scrub_bio_end_io_worker, NULL,
NULL);
INIT_WORK(&sbio->work, scrub_bio_end_io_worker);
if (i != SCRUB_BIOS_PER_SCTX - 1)
sctx->bios[i]->next_free = i + 1;
@ -1718,11 +1717,11 @@ static void scrub_wr_bio_end_io(struct bio *bio)
sbio->status = bio->bi_status;
sbio->bio = bio;
btrfs_init_work(&sbio->work, scrub_wr_bio_end_io_worker, NULL, NULL);
btrfs_queue_work(fs_info->scrub_wr_completion_workers, &sbio->work);
INIT_WORK(&sbio->work, scrub_wr_bio_end_io_worker);
queue_work(fs_info->scrub_wr_completion_workers, &sbio->work);
}
static void scrub_wr_bio_end_io_worker(struct btrfs_work *work)
static void scrub_wr_bio_end_io_worker(struct work_struct *work)
{
struct scrub_bio *sbio = container_of(work, struct scrub_bio, work);
struct scrub_ctx *sctx = sbio->sctx;
@ -2119,10 +2118,10 @@ static void scrub_missing_raid56_end_io(struct bio *bio)
bio_put(bio);
btrfs_queue_work(fs_info->scrub_workers, &sblock->work);
queue_work(fs_info->scrub_workers, &sblock->work);
}
static void scrub_missing_raid56_worker(struct btrfs_work *work)
static void scrub_missing_raid56_worker(struct work_struct *work)
{
struct scrub_block *sblock = container_of(work, struct scrub_block, work);
struct scrub_ctx *sctx = sblock->sctx;
@ -2212,7 +2211,7 @@ static void scrub_missing_raid56_pages(struct scrub_block *sblock)
raid56_add_scrub_pages(rbio, sector->page, 0, sector->logical);
}
btrfs_init_work(&sblock->work, scrub_missing_raid56_worker, NULL, NULL);
INIT_WORK(&sblock->work, scrub_missing_raid56_worker);
scrub_block_get(sblock);
scrub_pending_bio_inc(sctx);
raid56_submit_missing_rbio(rbio);
@ -2332,10 +2331,10 @@ static void scrub_bio_end_io(struct bio *bio)
sbio->status = bio->bi_status;
sbio->bio = bio;
btrfs_queue_work(fs_info->scrub_workers, &sbio->work);
queue_work(fs_info->scrub_workers, &sbio->work);
}
static void scrub_bio_end_io_worker(struct btrfs_work *work)
static void scrub_bio_end_io_worker(struct work_struct *work)
{
struct scrub_bio *sbio = container_of(work, struct scrub_bio, work);
struct scrub_ctx *sctx = sbio->sctx;
@ -2765,7 +2764,7 @@ static void scrub_free_parity(struct scrub_parity *sparity)
kfree(sparity);
}
static void scrub_parity_bio_endio_worker(struct btrfs_work *work)
static void scrub_parity_bio_endio_worker(struct work_struct *work)
{
struct scrub_parity *sparity = container_of(work, struct scrub_parity,
work);
@ -2786,9 +2785,8 @@ static void scrub_parity_bio_endio(struct bio *bio)
bio_put(bio);
btrfs_init_work(&sparity->work, scrub_parity_bio_endio_worker, NULL,
NULL);
btrfs_queue_work(fs_info->scrub_parity_workers, &sparity->work);
INIT_WORK(&sparity->work, scrub_parity_bio_endio_worker);
queue_work(fs_info->scrub_parity_workers, &sparity->work);
}
static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
@ -3958,22 +3956,23 @@ static void scrub_workers_put(struct btrfs_fs_info *fs_info)
{
if (refcount_dec_and_mutex_lock(&fs_info->scrub_workers_refcnt,
&fs_info->scrub_lock)) {
struct btrfs_workqueue *scrub_workers = NULL;
struct btrfs_workqueue *scrub_wr_comp = NULL;
struct btrfs_workqueue *scrub_parity = NULL;
scrub_workers = fs_info->scrub_workers;
scrub_wr_comp = fs_info->scrub_wr_completion_workers;
scrub_parity = fs_info->scrub_parity_workers;
struct workqueue_struct *scrub_workers = fs_info->scrub_workers;
struct workqueue_struct *scrub_wr_comp =
fs_info->scrub_wr_completion_workers;
struct workqueue_struct *scrub_parity =
fs_info->scrub_parity_workers;
fs_info->scrub_workers = NULL;
fs_info->scrub_wr_completion_workers = NULL;
fs_info->scrub_parity_workers = NULL;
mutex_unlock(&fs_info->scrub_lock);
btrfs_destroy_workqueue(scrub_workers);
btrfs_destroy_workqueue(scrub_wr_comp);
btrfs_destroy_workqueue(scrub_parity);
if (scrub_workers)
destroy_workqueue(scrub_workers);
if (scrub_wr_comp)
destroy_workqueue(scrub_wr_comp);
if (scrub_parity)
destroy_workqueue(scrub_parity);
}
}
@ -3983,9 +3982,9 @@ static void scrub_workers_put(struct btrfs_fs_info *fs_info)
static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
int is_dev_replace)
{
struct btrfs_workqueue *scrub_workers = NULL;
struct btrfs_workqueue *scrub_wr_comp = NULL;
struct btrfs_workqueue *scrub_parity = NULL;
struct workqueue_struct *scrub_workers = NULL;
struct workqueue_struct *scrub_wr_comp = NULL;
struct workqueue_struct *scrub_parity = NULL;
unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND;
int max_active = fs_info->thread_pool_size;
int ret = -ENOMEM;
@ -3993,18 +3992,16 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
if (refcount_inc_not_zero(&fs_info->scrub_workers_refcnt))
return 0;
scrub_workers = btrfs_alloc_workqueue(fs_info, "scrub", flags,
is_dev_replace ? 1 : max_active, 4);
scrub_workers = alloc_workqueue("btrfs-scrub", flags,
is_dev_replace ? 1 : max_active);
if (!scrub_workers)
goto fail_scrub_workers;
scrub_wr_comp = btrfs_alloc_workqueue(fs_info, "scrubwrc", flags,
max_active, 2);
scrub_wr_comp = alloc_workqueue("btrfs-scrubwrc", flags, max_active);
if (!scrub_wr_comp)
goto fail_scrub_wr_completion_workers;
scrub_parity = btrfs_alloc_workqueue(fs_info, "scrubparity", flags,
max_active, 2);
scrub_parity = alloc_workqueue("btrfs-scrubparity", flags, max_active);
if (!scrub_parity)
goto fail_scrub_parity_workers;
@ -4025,11 +4022,11 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
mutex_unlock(&fs_info->scrub_lock);
ret = 0;
btrfs_destroy_workqueue(scrub_parity);
destroy_workqueue(scrub_parity);
fail_scrub_parity_workers:
btrfs_destroy_workqueue(scrub_wr_comp);
destroy_workqueue(scrub_wr_comp);
fail_scrub_wr_completion_workers:
btrfs_destroy_workqueue(scrub_workers);
destroy_workqueue(scrub_workers);
fail_scrub_workers:
return ret;
}

2
fs/btrfs/super.c
View file

@ -1913,8 +1913,6 @@ static void btrfs_resize_thread_pool(struct btrfs_fs_info *fs_info,
btrfs_workqueue_set_max(fs_info->endio_write_workers, new_pool_size);
btrfs_workqueue_set_max(fs_info->endio_freespace_worker, new_pool_size);
btrfs_workqueue_set_max(fs_info->delayed_workers, new_pool_size);
btrfs_workqueue_set_max(fs_info->scrub_wr_completion_workers,
new_pool_size);
}
static inline void btrfs_remount_begin(struct btrfs_fs_info *fs_info,