btrfs: zoned: no longer count fresh BG region as zone unusable

Now that we switched to write time activation, we no longer need to (and
must not) count the fresh region as zone unusable. This commit is similar
to revert of commit fa2068d7e922b434eb ("btrfs: zoned: count fresh BG
region as zone unusable").

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index cd5bfda2c259d5e8c31d4c8a6b765e12d29422af..27fad70451aad754a2d0b10367b39fc5a53efe15 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2704,13 +2704,8 @@ static int __btrfs_add_free_space_zoned(struct btrfs_block_group *block_group,
                bg_reclaim_threshold = READ_ONCE(sinfo->bg_reclaim_threshold);
 
        spin_lock(&ctl->tree_lock);
-       /* Count initial region as zone_unusable until it gets activated. */
        if (!used)
                to_free = size;
-       else if (initial &&
-                test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &block_group->fs_info->flags) &&
-                (block_group->flags & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM)))
-               to_free = 0;
        else if (initial)
                to_free = block_group->zone_capacity;
        else if (offset >= block_group->alloc_offset)
@@ -2738,8 +2733,7 @@ static int __btrfs_add_free_space_zoned(struct btrfs_block_group *block_group,
        reclaimable_unusable = block_group->zone_unusable -
                               (block_group->length - block_group->zone_capacity);
        /* All the region is now unusable. Mark it as unused and reclaim */
-       if (block_group->zone_unusable == block_group->length &&
-           block_group->alloc_offset) {
+       if (block_group->zone_unusable == block_group->length) {
                btrfs_mark_bg_unused(block_group);
        } else if (bg_reclaim_threshold &&
                   reclaimable_unusable >=

diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 099cb6a6d3b3443c7c9d0ab5ddcaa91a1d9f8afd..52f49b0d2dee266bc95f8f42744a287a4d91d1f6 100644 (file)
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -1586,19 +1586,9 @@ void btrfs_calc_zone_unusable(struct btrfs_block_group *cache)
                return;
 
        WARN_ON(cache->bytes_super != 0);
-
-       /* Check for block groups never get activated */
-       if (test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &cache->fs_info->flags) &&
-           cache->flags & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM) &&
-           !test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags) &&
-           cache->alloc_offset == 0) {
-               unusable = cache->length;
-               free = 0;
-       } else {
-               unusable = (cache->alloc_offset - cache->used) +
-                          (cache->length - cache->zone_capacity);
-               free = cache->zone_capacity - cache->alloc_offset;
-       }
+       unusable = (cache->alloc_offset - cache->used) +
+                  (cache->length - cache->zone_capacity);
+       free = cache->zone_capacity - cache->alloc_offset;
 
        /* We only need ->free_space in ALLOC_SEQ block groups */
        cache->cached = BTRFS_CACHE_FINISHED;
@@ -1962,7 +1952,6 @@ int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
 bool btrfs_zone_activate(struct btrfs_block_group *block_group)
 {
        struct btrfs_fs_info *fs_info = block_group->fs_info;
-       struct btrfs_space_info *space_info = block_group->space_info;
        struct map_lookup *map;
        struct btrfs_device *device;
        u64 physical;
@@ -1975,7 +1964,6 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group)
 
        map = block_group->physical_map;
 
-       spin_lock(&space_info->lock);
        spin_lock(&block_group->lock);
        if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) {
                ret = true;
@@ -2025,14 +2013,7 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group)
 
        /* Successfully activated all the zones */
        set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags);
-       WARN_ON(block_group->alloc_offset != 0);
-       if (block_group->zone_unusable == block_group->length) {
-               block_group->zone_unusable = block_group->length - block_group->zone_capacity;
-               space_info->bytes_zone_unusable -= block_group->zone_capacity;
-       }
        spin_unlock(&block_group->lock);
-       btrfs_try_granting_tickets(fs_info, space_info);
-       spin_unlock(&space_info->lock);
 
        /* For the active block group list */
        btrfs_get_block_group(block_group);
@@ -2045,7 +2026,6 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group)
 
 out_unlock:
        spin_unlock(&block_group->lock);
-       spin_unlock(&space_info->lock);
        return ret;
 }