[PATCH 6/9] btrfs: use the new bit BTRFS_FS_TREE_MOD_LOG_USERS at btrfs_free_tree_block()
From: fdmanana@kernel.org
Date: 2021-03-11 14:32:27
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
From: Filipe Manana <redacted> 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 <redacted> --- fs/btrfs/extent-tree.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2482b26b1971..7a28314189b4 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c@@ -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);
--
2.28.0