linux-kernel - Re: [PATCH] md/dm-raid: don't clear MD_RECOVERY

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Date: Mon, 3 Jun 2024 10:50:37 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: linan666@...weicloud.com, agk@...hat.com, snitzer@...nel.org,
 mpatocka@...hat.com, song@...nel.org, xni@...hat.com
Cc: dm-devel@...ts.linux.dev, linux-kernel@...r.kernel.org,
 yi.zhang@...wei.com, houtao1@...wei.com, yangerkun@...wei.com,
 "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] md/dm-raid: don't clear MD_RECOVERY_FROZEN after setting
 frozen

在 2024/06/01 17:06, linan666@...weicloud.com 写道:
> From: Li Nan <linan122@...wei.com>
> 
> MD_RECOVERY_FROZEN should always remain set after array is frozen. But
> in raid_message(), this flag is cleared soon after frozen. Fix it. This
> flag will be cleared in md_idle_sync_thread(), there is no need to clear
> it again for idle.
> 
> Fixes: cd32b27a66db ("md/dm-raid: don't call md_reap_sync_thread() directly")
> Signed-off-by: Li Nan <linan122@...wei.com>
> ---
>   drivers/md/dm-raid.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
> index abe88d1e6735..466740a3a522 100644
> --- a/drivers/md/dm-raid.c
> +++ b/drivers/md/dm-raid.c
> @@ -3744,9 +3744,10 @@ static int raid_message(struct dm_target *ti, unsigned int argc, char **argv,
>   
>   		md_idle_sync_thread(mddev);
>   		mddev_unlock(mddev);
> +	} else {
> +		clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>   	}
>   
> -	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);

LGTM
Reviewed-by: Yu Kuai <yukuai3@...wei.com>

>   	if (decipher_sync_action(mddev, mddev->recovery) != st_idle)
>   		return -EBUSY;
>   	else if (!strcasecmp(argv[0], "resync"))
>