diff options
| author | Nikolay Borisov <nborisov@suse.com> | 2019-05-09 18:11:11 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-01 13:34:59 +0200 |
| commit | 0b6f5d408bb5df3101eb1944b1f301dea50c7e7e (patch) | |
| tree | 1e4cc071f098729f54b015990f77704290a58531 /fs/btrfs/volumes.h | |
| parent | bd80d94efb83acd67d48f9f3f07483c8306085aa (diff) | |
btrfs: Add comments on locking of several device-related fields
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 4a7a4d90ded8..fea7b65a712e 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -43,8 +43,8 @@ struct btrfs_pending_bios { #define BTRFS_DEV_STATE_FLUSH_SENT (4) struct btrfs_device { - struct list_head dev_list; - struct list_head dev_alloc_list; + struct list_head dev_list; /* device_list_mutex */ + struct list_head dev_alloc_list; /* chunk mutex */ struct list_head post_commit_list; /* chunk mutex */ struct btrfs_fs_devices *fs_devices; struct btrfs_fs_info *fs_info; @@ -229,9 +229,14 @@ struct btrfs_fs_devices { * this mutex lock. */ struct mutex device_list_mutex; + + /* List of all devices, protected by device_list_mutex */ struct list_head devices; - /* devices not currently being allocated */ + /* + * Devices which can satisfy space allocation. Protected by + * chunk_mutex + */ struct list_head alloc_list; struct btrfs_fs_devices *seed; |