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Date:   Wed, 22 Feb 2017 17:17:54 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Yunlong Song <yunlong.song@...wei.com>
Cc:     cm224.lee@...sung.com, yuchao0@...wei.com, chao@...nel.org,
        sylinux@....com, miaoxie@...wei.com, bintian.wang@...wei.com,
        linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] f2fs: provide more chance for node and data to get
 ssr segment

Hi Yunlong,

I've been testing the similar patches as I attached.

Thanks,

On 02/22, Yunlong Song wrote:
> Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
> ---
>  fs/f2fs/segment.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 9d13743..5fe71b9 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -1540,12 +1540,17 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
>  {
>  	struct curseg_info *curseg = CURSEG_I(sbi, type);
>  	const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops;
> +	int old_type = type;
>  
>  	if (IS_NODESEG(type)) {
>  		for (; type >= CURSEG_HOT_NODE; type--)
>  			if (v_ops->get_victim(sbi, &(curseg)->next_segno,
>  							BG_GC, type, SSR))
>  				return 1;
> +		for (type = old_type + 1; type <= CURSEG_COLD_NODE; type++)
> +			if (v_ops->get_victim(sbi, &(curseg)->next_segno,
> +							BG_GC, type, SSR))
> +				return 1;
>  		return 0;
>  	}
>  
> @@ -1554,6 +1559,10 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
>  		if (v_ops->get_victim(sbi, &(curseg)->next_segno,
>  						BG_GC, type, SSR))
>  			return 1;
> +	for (type = old_type + 1; type <= CURSEG_COLD_DATA; type++)
> +		if (v_ops->get_victim(sbi, &(curseg)->next_segno,
> +						BG_GC, type, SSR))
> +			return 1;
>  	return 0;
>  }
>  
> -- 
> 1.8.5.2

View attachment "0001-f2fs-find-data-segments-across-all-the-types.patch" of type "text/plain" (1439 bytes)

View attachment "0002-f2fs-do-SSR-for-node-segments-more-aggresively.patch" of type "text/plain" (1383 bytes)

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