diff options
| author | Filipe Manana <fdmanana@suse.com> | 2024-01-25 09:53:23 +0000 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-03-04 16:24:46 +0100 |
| commit | 4d9450113e60def0bece006d0f8ef7c5f26adf60 (patch) | |
| tree | 7744255c85878ef71f24e44406d7ae2dda39177a | |
| parent | 91701bdfa2bd97c77597cfa9d189a70265637103 (diff) | |
btrfs: document what the spinlock unused_bgs_lock protects
Add some comments to struct btrfs_fs_info to explicitly document which
members are protected by the spinlock unused_bgs_lock. It is currently
used to protect two linked lists, the reclaim_bgs and unused_bgs lists.
So add an explicit comment on top of each list to mention its protected
by unused_bgs_lock, as well as comment on top of unused_bgs_lock to
mention the lists it protects.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/fs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h index b747134fac77..97d10ed4b2c1 100644 --- a/fs/btrfs/fs.h +++ b/fs/btrfs/fs.h @@ -731,10 +731,13 @@ struct btrfs_fs_info { /* Reclaim partially filled block groups in the background */ struct work_struct reclaim_bgs_work; + /* Protected by unused_bgs_lock. */ struct list_head reclaim_bgs; int bg_reclaim_threshold; + /* Protects the lists unused_bgs and reclaim_bgs. */ spinlock_t unused_bgs_lock; + /* Protected by unused_bgs_lock. */ struct list_head unused_bgs; struct mutex unused_bg_unpin_mutex; /* Protect block groups that are going to be deleted */ |