diff options
| author | Naohiro Aota <naohiro.aota@wdc.com> | 2023-08-08 01:12:36 +0900 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-08-21 14:52:19 +0200 |
| commit | a7e1ac7bdc5af91af2d52e6269fdbd92fe9ee353 (patch) | |
| tree | 37a66cbd5817818c68f548991360845c30c441c1 /fs/btrfs/zoned.h | |
| parent | c1c3c2bc2917d09bbb19cb9894ba5950254b9502 (diff) | |
btrfs: zoned: reserve zones for an active metadata/system block group
Ensure a metadata and system block group can be activated on write time, by
leaving a certain number of active zones when trying to activate a data
block group.
Zones for two metadata block groups (normal and tree-log) and one system
block group are reserved, according to the profile type: two zones per
block group on the DUP profile and one zone per block group otherwise.
The reservation must be freed once a non-data block group is allocated. If
not, we over-reserve the active zones and data block group activation will
suffer. For the dynamic reservation count, we need to manage the
reservation count per device.
The reservation count variable is protected by
fs_info->zone_active_bgs_lock.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/zoned.h')
| -rw-r--r-- | fs/btrfs/zoned.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h index 74ec37a25808..b9cec523b778 100644 --- a/fs/btrfs/zoned.h +++ b/fs/btrfs/zoned.h @@ -22,6 +22,11 @@ struct btrfs_zoned_device_info { u8 zone_size_shift; u32 nr_zones; unsigned int max_active_zones; + /* + * Reserved active zones for one metadata and one system block group. + * It can vary per-device depending on the allocation status. + */ + int reserved_active_zones; atomic_t active_zones_left; unsigned long *seq_zones; unsigned long *empty_zones; @@ -78,6 +83,7 @@ void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logica int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, struct btrfs_space_info *space_info, bool do_finish); +void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); #else /* CONFIG_BLK_DEV_ZONED */ static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, struct blk_zone *zone) @@ -252,6 +258,8 @@ static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, return 0; } +static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } + #endif static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) |