linux-kernel - Re: [PATCH] f2fs: change segment to section in f2fs_ioc_gc

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Message-ID: <1dedda7c-edf5-82ae-787b-c2276e7c7275@huawei.com>
Date:   Thu, 25 Oct 2018 09:46:50 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Yunlong Song <yunlong.song@...wei.com>, <jaegeuk@...nel.org>,
        <chao@...nel.org>, <yunlong.song@...oud.com>
CC:     <miaoxie@...wei.com>, <bintian.wang@...wei.com>,
        <shengyong1@...wei.com>, <heyunlei@...wei.com>,
        <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] f2fs: change segment to section in f2fs_ioc_gc_range

On 2018/10/24 22:35, Yunlong Song wrote:
> f2fs_ioc_gc_range skips blocks_per_seg each time, however, f2fs_gc moves
> blocks of section each time, so fix it from segment to section.

I'm okay with this change, BTW, I notice that I need to change it to use
sbi->blocks_per_seg * sbi->migration_granularity in my patchset if this
patch being merged firstly.

> 
> Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
> ---
>  fs/f2fs/file.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 88b1246..8c06724 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -2155,7 +2155,7 @@ static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
>  	}
>  
>  	ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
> -	range.start += sbi->blocks_per_seg;
> +	range.start += sbi->blocks_per_seg * sbi->segs_per_sec;

use BLKS_PER_SEC() for cleanup?

>  	if (range.start <= end)
>  		goto do_more;
>  out:
>