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

From: Chao Yu
Date: Tue Feb 28 2017 - 05:58:41 EST


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@xxxxxxxxxx>
> 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@xxxxxxxxxx>
> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> ---
> 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);
>
>