Btrfs: use slabs for delayed reference allocation

The delayed reference allocation is in the fast path of the IO, so use slabs
to improve the speed of the allocation.

And besides that, it can do check for leaked objects when the module is removed.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 61da9d0bb805..9bd87f0d73d0 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2285,7 +2285,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
                         ref = &locked_ref->node;
 
                         if (extent_op && must_insert_reserved) {
-                                kfree(extent_op);
+                                btrfs_free_delayed_extent_op(extent_op);
                                 extent_op = NULL;
                         }
 
@@ -2294,7 +2294,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
 
                                 ret = run_delayed_extent_op(trans, root,
                                                             ref, extent_op);
-                                kfree(extent_op);
+                                btrfs_free_delayed_extent_op(extent_op);
 
                                 if (ret) {
                                         list_del_init(&locked_ref->cluster);
@@ -2338,7 +2338,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
                                           must_insert_reserved);
 
                 btrfs_put_delayed_ref(ref);
-                kfree(extent_op);
+                btrfs_free_delayed_extent_op(extent_op);
                 count++;
 
                 if (ret) {
@@ -2586,7 +2586,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
         struct btrfs_delayed_extent_op *extent_op;
         int ret;
 
-        extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
+        extent_op = btrfs_alloc_delayed_extent_op();
         if (!extent_op)
                 return -ENOMEM;
 
@@ -2598,7 +2598,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
         ret = btrfs_add_delayed_extent_op(root->fs_info, trans, bytenr,
                                           num_bytes, extent_op);
         if (ret)
-                kfree(extent_op);
+                btrfs_free_delayed_extent_op(extent_op);
         return ret;
 }
 
@@ -5330,7 +5330,7 @@ static noinline int check_ref_cleanup(struct btrfs_trans_handle *trans,
         if (head->extent_op) {
                 if (!head->must_insert_reserved)
                         goto out;
-                kfree(head->extent_op);
+                btrfs_free_delayed_extent_op(head->extent_op);
                 head->extent_op = NULL;
         }
 
@@ -6400,7 +6400,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
 
         if (root_objectid != BTRFS_TREE_LOG_OBJECTID) {
                 struct btrfs_delayed_extent_op *extent_op;
-                extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
+                extent_op = btrfs_alloc_delayed_extent_op();
                 BUG_ON(!extent_op); /* -ENOMEM */
                 if (key)
                         memcpy(&extent_op->key, key, sizeof(extent_op->key));