Re: [PATCH v2 0/3] btrfs: search_tree ioctl performance improvements and cleanups

[Sun YangKai <sunk67188@gmail.com>]

> This series optimizes the search_tree ioctl path used by tools like
> compsize and cleans up related code:
> 
> Patch 1: Narrow loop variable scope
> 
> Patch 2: Early exit for out-of-range keys
> 
>     Replace continue with early exit when keys exceed max_key
> 
>     Provide measurable performance improvements:
>     Cold cache: 34.61s → 30.40s (about 12% improvement)
>     Hot cache: 14.19s → 10.57s (about 25% improvement)
> 
> Patch 3: Simplify key range checking
> 
>     Replace key_in_sk() helper with direct comparisons
> 
>     Add ASSERT for min_key validation (safe due to forward search)
> 
>     Maintain equivalent functionality with cleaner implementation
> 
> These changes optimize a critical path for filesystem analysis tools while
> improving code maintainability. The performance gains are particularly
> noticeable when scanning large filesystems.
> 
> Thanks,
> Sun YangKai
> 
> ---
> 
> Changes since v1:
> 
> * Replace the WARN_ON with ASSERT, since the condition is a runtime error.
>   Suggested by David Sterba.
> 
> ---
> 
> Sun YangKai (3):
>   btrfs: narrow loop variable scope in copy_to_sk()
>   btrfs: early exit the searching process in search_tree ioctl
>   btrfs: replace key_in_sk() with a simple btrfs_key compare
> 
>  fs/btrfs/ioctl.c | 55 +++++++++++++++++-------------------------------
>  1 file changed, 19 insertions(+), 36 deletions(-)

Politely ping. Is there anything blocking this?