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btrfs: use the new bit BTRFS_FS_TREE_MOD_LOG_USERS at btrfs_free_tree_block() 

Instead of exposing implementation details of the tree mod log to check
if there are active tree mod log users at btrfs_free_tree_block(), use
the new bit BTRFS_FS_TREE_MOD_LOG_USERS for fs_info->flags instead. This
way extent-tree.c does not need to known about any of the internals of
the tree mod log and avoids taking a lock unnecessarily as well.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2021-03-11 14:31:10 +00:00 committed by David Sterba
parent bc03f39ec3
commit 888dd18339
1 changed files with 3 additions and 5 deletions
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8
fs/btrfs/extent-tree.c
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@ -3342,11 +3342,9 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
* find a node pointing to this leaf and record operations that
* point to this leaf.
*/
if (btrfs_header_level(buf) == 0) {
read_lock(&fs_info->tree_mod_log_lock);
must_pin = !list_empty(&fs_info->tree_mod_seq_list);
read_unlock(&fs_info->tree_mod_log_lock);
}
if (btrfs_header_level(buf) == 0 &&
test_bit(BTRFS_FS_TREE_MOD_LOG_USERS, &fs_info->flags))
must_pin = true;
if (must_pin || btrfs_is_zoned(fs_info)) {
btrfs_redirty_list_add(trans->transaction, buf);