Re: [PATCH] btrfs: remove BTRFS_REF_LAST from btrfs_ref_type

[Qu Wenruo]

在 2025/4/15 18:26, 李扬韬 写道:
> > History please.
>
> Did you mean change commit msg to below?
>
> 	Commit b28b1f0ce44c ("btrfs: delayed-ref: Introduce better documented delayed ref structures") introduce BTRFS_REF_LAST but never use it,
> 	So let's remove it.

It's the common practice to leave a last entry for sanity checks.

But since it's not utilized for anything, I'm fine to remove it.

> > The _LAST or _NR suffix can be utilized to do sanity checks, and this is not part of the on-disk format.
>
> IIRC, delayed ref belongs to the extent tree memory kv cache.
>
> > And if this exposed by some automatic tools, please also mention it.
>
> I'm just looking at this code.
>
> Thx,
> Yangtao