linux-kernel - Re: [PATCH -next 6/8] md/md-multipath: enable io accounting

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Date:   Tue, 20 Jun 2023 17:11:09 +0800
From:   Xiao Ni <xni@...hat.com>
To:     Yu Kuai <yukuai1@...weicloud.com>
Cc:     song@...nel.org, linux-raid@...r.kernel.org,
        linux-kernel@...r.kernel.org, yukuai3@...wei.com,
        yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH -next 6/8] md/md-multipath: enable io accounting

On Mon, Jun 19, 2023 at 8:50 PM Yu Kuai <yukuai1@...weicloud.com> wrote:
>
> From: Yu Kuai <yukuai3@...wei.com>
>
> use md_account_bio() to enable io accounting, also make sure
> mddev_suspend() will wait for all io to be done.
>
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---
>  drivers/md/md-multipath.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/md/md-multipath.c b/drivers/md/md-multipath.c
> index 92c45be203d7..d22276870283 100644
> --- a/drivers/md/md-multipath.c
> +++ b/drivers/md/md-multipath.c
> @@ -107,6 +107,7 @@ static bool multipath_make_request(struct mddev *mddev, struct bio * bio)
>             && md_flush_request(mddev, bio))
>                 return true;
>
> +       md_account_bio(mddev, &bio);
>         mp_bh = mempool_alloc(&conf->pool, GFP_NOIO);
>
>         mp_bh->master_bio = bio;
> --
> 2.39.2
>

Reviewed-by: Xiao Ni <xni@...hat.com>