Re: [PATCH] btrfs: remove btrfs_fs_info::stripesize

On Wed, Jun 24, 2026 at 01:53:28PM +0930, Qu Wenruo wrote:
> Btrfs does not support variable stripe length yet, all RAID0/5/6/10
> chunks have the fixed stripe length 64K for now.

The question is if the 'for now' will turn into configurable stripe size
in the future. This was the plan, but long time ago. I think we can
remove it anyway, the code is no-op and adding proper support would need
more changes that just that.

> Furthermore, btrfs_fs_info::stripesize is not the real chunk stripe
> length, it's always the same value as sectorsize.
> 
> Remove btrfs_fs_info::stripesize, and for the only callsite utilizing
> that member, replace it with fs_info->sectorsize instead.
> 
> Signed-off-by: Qu Wenruo <[email protected]>

Reviewed-by: David Sterba <[email protected]>

> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -4757,7 +4757,7 @@ static noinline int find_free_extent(struct btrfs_root *root,
>  
>  		/* Checks */
>  		ffe_ctl->search_start = round_up(ffe_ctl->found_offset,
> -						 fs_info->stripesize);
> +						 fs_info->sectorsize);

This seems to be the only relevant use in case the stripe size would not
be equal to sector size.