Re: [PATCH 0/4] Cleanups around compress path

[Nikolay Borisov <nborisov@suse.com>]

On 13.02.19 г. 17:53 ч., Nikolay Borisov wrote:
> This series aims to streamline the logic in cow_file_range_async which is 
> invoked if extents have to be compressed. The main change is that the logic of 
> the loop in the function is now centered around the idea of chunks (in case 
> compression is enabled). So it's obvious that we will submit as many chunks as 
> necessary. The 2nd improvement is to eliminate the BUG_ON that is dependent on the 
> return value of kmalloc. Now, an array of struct async_cow is allocated, preceded 
> by an atomic_t, shared by all chunks. This allows to bail out before submitting 
> any io whatsoever and mark the page as errored out. 
> 
> Rest of the patches are pure quality-of-live improvements - simplifying function
> signature, removing unused code/redundant data members. 
>  
> Needless to say this has survived full xfstest run. 
> 
> Nikolay Borisov (4):
>   btrfs: Refactor cow_file_range_async
>   btrfs: Remove fs_info from struct async_cow
>   btrfs: Make compress_file_range only struct async_cow
>   btrfs: Replace clear_extent_bit with unlock_extent
> 
>  fs/btrfs/inode.c | 105 +++++++++++++++++++++++++++--------------------
>  1 file changed, 60 insertions(+), 45 deletions(-)
> 


Disregard this, I will resend.