linux-kernel - Re: [PATCH] md/raid10: clean up md_add_new

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Message-ID: <216ed892-11a9-2d8b-c6d5-a0c7dabe2c9d@huaweicloud.com>
Date:   Sun, 28 May 2023 15:49:50 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     linan666@...weicloud.com, song@...nel.org
Cc:     linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
        linan122@...wei.com, yi.zhang@...wei.com, houtao1@...wei.com,
        yangerkun@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] md/raid10: clean up md_add_new_disk()

在 2023/05/27 18:18, linan666@...weicloud.com 写道:
> From: Li Nan <linan122@...wei.com>
> 
> Commit 1a855a060665 ("md: fix bug with re-adding of partially recovered
> device.") only add device which is set to In_sync. But it let devices
> without metadata cannot be added when they should be.
> 
> Commit bf572541ab44 ("md: fix regression with re-adding devices to arrays
> with no metadata") fix the above issue, it set device without metadata to
> In_sync when add new disk.
> 
> However, after commit f466722ca614 ("md: Change handling of save_raid_disk
> and metadata update during recovery.") deletes changes of the first patch,
> setting In_sync for devcie without metadata is meanless because the flag
> will be cleared soon and will not be used during this period. Clean it up.

LGME, feel free to add:

Reviewed-by: Yu Kuai <yukuai3@...wei.com>
> 
> Signed-off-by: Li Nan <linan122@...wei.com>
> ---
>   drivers/md/md.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index 8e344b4b3444..e5b67b2d2166 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -6733,7 +6733,6 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
>   			if (info->state & (1<<MD_DISK_SYNC)  &&
>   			    info->raid_disk < mddev->raid_disks) {
>   				rdev->raid_disk = info->raid_disk;
> -				set_bit(In_sync, &rdev->flags);
>   				clear_bit(Bitmap_sync, &rdev->flags);
>   			} else
>   				rdev->raid_disk = -1;
>