linux-kernel - [PATCH 7/7] f2fs: don't need to flush unlinked dentry pages

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Message-Id: <20160608172444.60371-7-jaegeuk@kernel.org>
Date:	Wed,  8 Jun 2016 10:24:44 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc:	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 7/7] f2fs: don't need to flush unlinked dentry pages

We don't need to flush any dentry pages used by unlinked directory.
They will be truncated by f2fs_evict_inode.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/checkpoint.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 4179c7b..e6714cb 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -846,7 +846,8 @@ retry:
 	inode = igrab(&fi->vfs_inode);
 	spin_unlock(&sbi->inode_lock[type]);
 	if (inode) {
-		filemap_fdatawrite(inode->i_mapping);
+		if (inode->i_nlink)
+			filemap_fdatawrite(inode->i_mapping);
 		iput(inode);
 	} else {
 		/*
-- 
2.8.3