Re: [PATCH 2/2] btrfs: reserve new relocation zone after successful relocation
From: Naohiro Aota
Date: Wed May 15 2024 - 14:01:22 EST
On Tue, May 14, 2024 at 11:13:22PM +0200, Johannes Thumshirn wrote:
> From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
>
> After we've committed a relocation transaction, we know we have just freed
> up space. Set it as hint for the next relocation.
>
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
> ---
> fs/btrfs/relocation.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
> index 8b24bb5a0aa1..d943abf5cb33 100644
> --- a/fs/btrfs/relocation.c
> +++ b/fs/btrfs/relocation.c
> @@ -3808,9 +3808,13 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
> err = PTR_ERR(trans);
> goto out_free;
> }
> +
> ret = btrfs_commit_transaction(trans);
> if (ret && !err)
> err = ret;
> +
> + /* We know we have just freed space, set it as hint for the next relocation */
> + btrfs_reserve_relocation_zone(fs_info);
With "if (!err)"? We definitely bail out fast in an error case.
> out_free:
> ret = clean_dirty_subvols(rc);
> if (ret < 0 && !err)
>
> --
> 2.35.3
>