Btrfs: use a slab for ordered extents allocation
The ordered extent allocation is in the fast path of the IO, so use a slab
to improve the speed of the allocation.
"Size of the struct is 280, so this will fall into the size-512 bucket,
giving 8 objects per page, while own slab will pack 14 objects into a page.
Another benefit I see is to check for leaked objects when the module is
removed (and the cache destroy takes place)."
-- David Sterba
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 83d6f9f..06ff1dd 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1620,10 +1620,14 @@
if (err)
goto free_extent_io;
- err = btrfs_delayed_inode_init();
+ err = ordered_data_init();
if (err)
goto free_extent_map;
+ err = btrfs_delayed_inode_init();
+ if (err)
+ goto free_ordered_data;
+
err = btrfs_interface_init();
if (err)
goto free_delayed_inode;
@@ -1641,6 +1645,8 @@
btrfs_interface_exit();
free_delayed_inode:
btrfs_delayed_inode_exit();
+free_ordered_data:
+ ordered_data_exit();
free_extent_map:
extent_map_exit();
free_extent_io:
@@ -1657,6 +1663,7 @@
{
btrfs_destroy_cachep();
btrfs_delayed_inode_exit();
+ ordered_data_exit();
extent_map_exit();
extent_io_exit();
btrfs_interface_exit();