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authorMiao Xie <miaox@cn.fujitsu.com>2012-09-06 14:01:51 +0400
committerChris Mason <chris.mason@fusionio.com>2012-10-01 23:19:11 +0400
commit6352b91da1a2108bb8cc5115e8714f90d706f15f (patch)
tree41897bbe836bb7f8b2bbfef24528407d1c79b8b0 /fs/btrfs/ordered-data.h
parentb9a8cc5bef963b76c5b6c3016b7e91988a3e758b (diff)
downloadlinux-6352b91da1a2108bb8cc5115e8714f90d706f15f.tar.xz
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>
Diffstat (limited to 'fs/btrfs/ordered-data.h')
-rw-r--r--fs/btrfs/ordered-data.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index c2443a431ca5..d1ddaeff1356 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -192,4 +192,6 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct inode *inode);
void btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput);
+int __init ordered_data_init(void);
+void ordered_data_exit(void);
#endif