linux-kernel - Re: [f2fs-dev] [PATCH 2/3 v2] f2fs: add bitmaps for empty or full NAT blocks

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Date:   Tue, 28 Feb 2017 18:52:57 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 2/3 v2] f2fs: add bitmaps for empty or full NAT
 blocks

On 2017/2/28 13:33, Jaegeuk Kim wrote:
> On 02/28, Chao Yu wrote:
>> On 2017/2/24 6:58, Jaegeuk Kim wrote:
>>> @@ -2326,7 +2431,8 @@ void flush_nat_entries(struct f2fs_sb_info *sbi)
>>>  	 * entries, remove all entries from journal and merge them
>>>  	 * into nat entry set.
>>>  	 */
>>> -	if (!__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
>>> +	if (cpc->reason == CP_UMOUNT ||
>>
>> enabled_nat_bits(sbi, cpc)
> 
> Thanks.
> I added another patch to fix this.

I'm OK with this change. Thanks, :)

Thanks,

> 
>>>From b15f7112c3daced4c7f70c4d5fcba9013743cb6b Mon Sep 17 00:00:00 2001
> From: Jaegeuk Kim <jaegeuk@...nel.org>
> Date: Mon, 27 Feb 2017 21:28:53 -0800
> Subject: [PATCH] f2fs: avoid to flush nat journal entries
> 
> This patch adds a missing condition which flushes nat journal entries
> unnecessarily introduced by:
> 
>     f2fs: add bitmaps for empty or full NAT blocks
> 
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/node.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index b3aead4c5a0f..94967171dee8 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -2513,7 +2513,7 @@ void flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>  	 * entries, remove all entries from journal and merge them
>  	 * into nat entry set.
>  	 */
> -	if (cpc->reason == CP_UMOUNT ||
> +	if (enabled_nat_bits(sbi, cpc) ||
>  		!__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
>  		remove_nats_in_journal(sbi);
>  
>