From: Chao Yu <yuchao0@huawei.com>
Date: Mon, 9 May 2016 11:56:34 +0000 (+0800)
Subject: f2fs: enable inline_dentry by default and add noinline_dentry option
X-Git-Tag: v4.9-rc1~105^2~52
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=97c1794a5dc160164aa7f161310da15c34d62641;p=karo-tx-linux.git

f2fs: enable inline_dentry by default and add noinline_dentry option

Make inline_dentry as default mount option to improve space usage and
IO performance in scenario of numerous small directory.
It adds noinline_dentry mount option, instead.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index ecd808088362..753dd4f96afe 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -131,6 +131,7 @@ inline_dentry          Enable the inline dir feature: data in new created
                        directory entries can be written into inode block. The
                        space of inode block which is used to store inline
                        dentries is limited to ~3.4k.
+noinline_dentry        Diable the inline dentry feature.
 flush_merge	       Merge concurrent cache_flush commands as much as possible
                        to eliminate redundant command issues. If the underlying
 		       device handles the cache_flush command relatively slowly,
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7f863a645ab1..555217fe43ce 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -87,6 +87,7 @@ enum {
 	Opt_inline_xattr,
 	Opt_inline_data,
 	Opt_inline_dentry,
+	Opt_noinline_dentry,
 	Opt_flush_merge,
 	Opt_noflush_merge,
 	Opt_nobarrier,
@@ -118,6 +119,7 @@ static match_table_t f2fs_tokens = {
 	{Opt_inline_xattr, "inline_xattr"},
 	{Opt_inline_data, "inline_data"},
 	{Opt_inline_dentry, "inline_dentry"},
+	{Opt_noinline_dentry, "noinline_dentry"},
 	{Opt_flush_merge, "flush_merge"},
 	{Opt_noflush_merge, "noflush_merge"},
 	{Opt_nobarrier, "nobarrier"},
@@ -488,6 +490,9 @@ static int parse_options(struct super_block *sb, char *options)
 		case Opt_inline_dentry:
 			set_opt(sbi, INLINE_DENTRY);
 			break;
+		case Opt_noinline_dentry:
+			clear_opt(sbi, INLINE_DENTRY);
+			break;
 		case Opt_flush_merge:
 			set_opt(sbi, FLUSH_MERGE);
 			break;
@@ -878,6 +883,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_puts(seq, ",noinline_data");
 	if (test_opt(sbi, INLINE_DENTRY))
 		seq_puts(seq, ",inline_dentry");
+	else
+		seq_puts(seq, ",noinline_dentry");
 	if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
 		seq_puts(seq, ",flush_merge");
 	if (test_opt(sbi, NOBARRIER))
@@ -975,6 +982,7 @@ static void default_options(struct f2fs_sb_info *sbi)
 
 	set_opt(sbi, BG_GC);
 	set_opt(sbi, INLINE_DATA);
+	set_opt(sbi, INLINE_DENTRY);
 	set_opt(sbi, EXTENT_CACHE);
 	sbi->sb->s_flags |= MS_LAZYTIME;
 	set_opt(sbi, FLUSH_MERGE);