linux-kernel - Re: [f2fs-dev] [PATCH 2/3] f2fs: add migration count iff migration happens

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Message-ID: <8b66e722-202b-b3b8-1543-e74379319a7f@huawei.com>
Date:   Mon, 17 Feb 2020 09:43:09 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 2/3] f2fs: add migration count iff migration
 happens

BTW

f2fs: add migration count iff migration happens

typo: iff

On 2020/2/15 2:58, Jaegeuk Kim wrote:
> If first segment is empty and migration_granularity is 1, we can't move this
> at all.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/gc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index 65c0687ee2bb..bbf4db3f6bb4 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -1233,12 +1233,12 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
>  							segno, gc_type);
>  
>  		stat_inc_seg_count(sbi, type, gc_type);
> +		migrated++;
>  
>  freed:
>  		if (gc_type == FG_GC &&
>  				get_valid_blocks(sbi, segno, false) == 0)
>  			seg_freed++;
> -		migrated++;
>  
>  		if (__is_large_section(sbi) && segno + 1 < end_segno)
>  			sbi->next_victim_seg[gc_type] = segno + 1;
>