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| author | Naohiro Aota <naohiro.aota@wdc.com> | 2021-02-04 11:22:18 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-02-09 02:46:08 +0100 |
| commit | 40ab3be102f0a61dbb93093f330b432324a793f1 (patch) | |
| tree | b7b92c35cdf2845fa4da3febca37f0b288d0e359 /fs/btrfs/zoned.h | |
| parent | btrfs: split alloc_log_tree() (diff) | |
| download | linux-40ab3be102f0a61dbb93093f330b432324a793f1.tar.xz linux-40ab3be102f0a61dbb93093f330b432324a793f1.zip | |
btrfs: zoned: extend zoned allocator to use dedicated tree-log block group
This is the 1/3 patch to enable tree log on zoned filesystems.
The tree-log feature does not work on a zoned filesystem as is. Blocks for
a tree-log tree are allocated mixed with other metadata blocks and btrfs
writes and syncs the tree-log blocks to devices at the time of fsync(),
which has a different timing than a global transaction commit. As a
result, both writing tree-log blocks and writing other metadata blocks
become non-sequential writes that zoned filesystems must avoid.
Introduce a dedicated block group for tree-log blocks, so that tree-log
blocks and other metadata blocks can be separate write streams. As a
result, each write stream can now be written to devices separately.
"fs_info->treelog_bg" tracks the dedicated block group and assigns
"treelog_bg" on-demand on tree-log block allocation time.
This commit extends the zoned block allocator to use the block group.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
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 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h index 932ad9bc0de6..61e969652fe1 100644 --- a/fs/btrfs/zoned.h +++ b/fs/btrfs/zoned.h @@ -7,6 +7,7 @@ #include <linux/blkdev.h> #include "volumes.h" #include "disk-io.h" +#include "block-group.h" struct btrfs_zoned_device_info { /* @@ -290,4 +291,17 @@ static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) mutex_unlock(&fs_info->zoned_meta_io_lock); } +static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) +{ + struct btrfs_fs_info *fs_info = bg->fs_info; + + if (!btrfs_is_zoned(fs_info)) + return; + + spin_lock(&fs_info->treelog_bg_lock); + if (fs_info->treelog_bg == bg->start) + fs_info->treelog_bg = 0; + spin_unlock(&fs_info->treelog_bg_lock); +} + #endif |