Hi Yongqiang,
On 09/29/2011 01:08 PM, Yongqiang Yang wrote:
> This patch adds a delayed extents tree in inode info, so that
> delayed extents can be look up quickly. Without the tree
> delayed extents are identified by looking up page cache.
>
> With the tree, FIEMAP, SEEK_HOLE/DATA, bigalloc and writeout
> path can be optimized a lot.
>
> Signed-off-by: Yongqiang Yang <xiaoqiangnk@xxxxxxxxx>
> ---
> fs/ext4/ext4.h | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index ccfa81f..d3c6b97 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -760,6 +760,8 @@ struct ext4_ext_cache {
> __u32 ec_len; /* must be 32bit to return holes */
> };
>
> +#include "delayed_extents.h"
> +
> /*
> * fourth extended file system inode data in memory
> */
> @@ -837,6 +839,9 @@ struct ext4_inode_info {
> struct list_head i_prealloc_list;
> spinlock_t i_prealloc_lock;
>
> + /* delayed extents */
> + struct ext4_de_tree i_de_tree;
> +
Can we integrate this patch with patch 1/6?
I think it would be beneficial for the reviewer to see both the
definition of the structure and the place you put it.
Thanks
Tao
> /* ialloc */
> ext4_group_t i_last_alloc_group;
>
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