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

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Date:   Mon, 27 Feb 2017 21:33:36 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
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 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.

>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);
 
-- 
2.11.0