@@ -2779,8 +2779,7 @@ static void scrub_workers_put(struct btrfs_fs_info *fs_info)
/*
* get a reference count on fs_info->scrub_workers. start worker if necessary
*/
-static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
- int is_dev_replace)
+static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info)
{
struct workqueue_struct *scrub_workers = NULL;
unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND;
@@ -2790,10 +2789,7 @@ 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;
- if (is_dev_replace)
- scrub_workers = alloc_ordered_workqueue("btrfs-scrub", flags);
- else
- scrub_workers = alloc_workqueue("btrfs-scrub", flags, max_active);
+ scrub_workers = alloc_workqueue("btrfs-scrub", flags, max_active);
if (!scrub_workers)
return -ENOMEM;
@@ -2845,7 +2841,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
if (IS_ERR(sctx))
return PTR_ERR(sctx);
- ret = scrub_workers_get(fs_info, is_dev_replace);
+ ret = scrub_workers_get(fs_info);
if (ret)
goto out_free_ctx;
The workqueue fs_info->scrub_worker would go ordered workqueue if it's a device replace operation. However the scrub is relying on multiple workers to do data csum verification, and we always submit several read requests in a row. Thus there is no need to use ordered workqueue just for dev-replace. We have extra synchronization (the main thread will always submit-and-wait for dev-replace writes) to handle it for zoned devices. Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/scrub.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)