On Thu, Sep 29, 2011 at 2:56 PM, Tao Ma <tm@xxxxxx> wrote:
> 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.
Ok. Thank you for your advice.
I will do that in next version.
Yongqiang.
>
> Thanks
> Tao
>> /* ialloc */
>> ext4_group_t i_last_alloc_group;
>>
>
>
--
Best Wishes
Yongqiang Yang
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