Re: [PATCH 0/2] send: Avoid sending disknr==0 and PREALLOC extents when possible

[Chen Yang <chenyang.fnst@cn.fujitsu.com>]

Hi, Alex
The patches can only solve part of questions, but some like "punch holes" problems 
as Alexander wrote are still unsolved. So I think these patches are unnecessary
if adding new command would help to solve all the questions.

Chen.

On 2013-1-9 4:11, Alex Lyakas wrote:
> These two patches address the issue of sending unneeded zero data for
> disknr==0 and PREALLOC extents.
> There is room for additional improvement for PREALLOC extents, but it
> requires adding a new command, so for
> now this is not addressed.
> 
> Please review and comment.
> 
> Thanks,
> Alex.
> 
> Alex Lyakas (2):
>   Avoid sending disknr==0 extents in the following cases:     1) full
>     send 2) new inode in a diff-send 3) when disknr==0 extents are
>     added to the end of an inode
>   On a diff-send, avoid sending PREALLOC extents, if the parent root
>     has only     PREALLOC extents on an appropriate file range.
> 
>  fs/btrfs/send.c |  178 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 172 insertions(+), 6 deletions(-)
> 
> --
> 1.7.9.5
>