linux-kernel - 回复: [PATCH] btrfs: remove BTRFS_REF_LAST from btrfs_ref

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Message-ID:
 <SEZPR06MB52691756B32BA90DBE82BDFDE8B22@SEZPR06MB5269.apcprd06.prod.outlook.com>
Date: Tue, 15 Apr 2025 08:56:03 +0000
From: 李扬韬 <frank.li@...o.com>
To: Qu Wenruo <quwenruo.btrfs@....com>, "clm@...com" <clm@...com>,
	"josef@...icpanda.com" <josef@...icpanda.com>, "dsterba@...e.com"
	<dsterba@...e.com>
CC: "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject:
 回复: [PATCH] btrfs: remove BTRFS_REF_LAST from btrfs_ref_type

> 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.

> 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