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>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d8982e9..67b373b 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1684,10 +1684,14 @@
if (err)
goto free_delayed_inode;
- err = btrfs_interface_init();
+ err = btrfs_delayed_ref_init();
if (err)
goto free_auto_defrag;
+ err = btrfs_interface_init();
+ if (err)
+ goto free_delayed_ref;
+
err = register_filesystem(&btrfs_fs_type);
if (err)
goto unregister_ioctl;
@@ -1699,6 +1703,8 @@
unregister_ioctl:
btrfs_interface_exit();
+free_delayed_ref:
+ btrfs_delayed_ref_exit();
free_auto_defrag:
btrfs_auto_defrag_exit();
free_delayed_inode:
@@ -1720,6 +1726,7 @@
static void __exit exit_btrfs_fs(void)
{
btrfs_destroy_cachep();
+ btrfs_delayed_ref_exit();
btrfs_auto_defrag_exit();
btrfs_delayed_inode_exit();
ordered_data_exit();