[PATCH 04/42] btrfs: only track ref_heads in delayed_ref_updates

[Josef Bacik]

From: Josef Bacik <jba...@fb.com>

We use this number to figure out how many delayed refs to run, but
__btrfs_run_delayed_refs really only checks every time we need a new
delayed ref head, so we always run at least one ref head completely no
matter what the number of items on it.  Fix the accounting to only be
adjusted when we add/remove a ref head.

Signed-off-by: Josef Bacik <jba...@fb.com>
---
 fs/btrfs/delayed-ref.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 3a9e4ac21794..27f7dd4e3d52 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -234,8 +234,6 @@ static inline void drop_delayed_ref(struct 
btrfs_trans_handle *trans,
        ref->in_tree = 0;
        btrfs_put_delayed_ref(ref);
        atomic_dec(&delayed_refs->num_entries);
-       if (trans->delayed_ref_updates)
-               trans->delayed_ref_updates--;
 }
 
 static bool merge_ref(struct btrfs_trans_handle *trans,
@@ -460,7 +458,6 @@ static int insert_delayed_ref(struct btrfs_trans_handle 
*trans,
        if (ref->action == BTRFS_ADD_DELAYED_REF)
                list_add_tail(&ref->add_list, &href->ref_add_list);
        atomic_inc(&root->num_entries);
-       trans->delayed_ref_updates++;
        spin_unlock(&href->lock);
        return ret;
 }
-- 
2.14.3