linux-kernel - Re: [PATCH RFC md-6.16 v3 19/19] md/md-llbitmap: add Kconfig

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Message-ID: <20250512051910.GC1667@lst.de>
Date: Mon, 12 May 2025 07:19:10 +0200
From: Christoph Hellwig <hch@....de>
To: Yu Kuai <yukuai1@...weicloud.com>
Cc: hch@....de, xni@...hat.com, colyli@...nel.org, agk@...hat.com,
	snitzer@...nel.org, mpatocka@...hat.com, song@...nel.org,
	yukuai3@...wei.com, linux-kernel@...r.kernel.org,
	dm-devel@...ts.linux.dev, linux-raid@...r.kernel.org,
	yi.zhang@...wei.com, yangerkun@...wei.com, johnny.chenyi@...wei.com
Subject: Re: [PATCH RFC md-6.16 v3 19/19] md/md-llbitmap: add Kconfig

On Mon, May 12, 2025 at 09:19:27AM +0800, Yu Kuai wrote:
> +config MD_LLBITMAP
> +	bool "MD RAID lockless bitmap support"
> +	default n

n is the default default.

> diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
> index 4e27f5f793b7..dd23b6fedb70 100644
> --- a/drivers/md/md-bitmap.h
> +++ b/drivers/md/md-bitmap.h
> @@ -22,6 +22,9 @@ typedef __u16 bitmap_counter_t;
>  enum bitmap_state {
>  	BITMAP_STALE	   = 1,  /* the bitmap file is out of date or had -EIO */
>  	BITMAP_WRITE_ERROR = 2, /* A write error has occurred */
> +	BITMAP_FIRST_USE   = 3, /* llbitmap is just created */
> +	BITMAP_CLEAN	   = 4, /* llbitmap is created with assume_clean */
> +	BITMAP_DAEMON_BUSY = 5, /* llbitmap daemon is not finished after daemon_sleep */

This should go into patches very early in the series, before the code
referencing them.