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Message-id: <00fa01d136fa$7c028980$74079c80$@samsung.com>
Date: Tue, 15 Dec 2015 13:35:21 +0800
From: Chao Yu <chao2.yu@...sung.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH 7/8] f2fs: introduce new option for controlling data flush
Add a new option 'data_flush' to enable/disable data flush functionality
in checkpoint.
Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
Documentation/filesystems/f2fs.txt | 2 ++
fs/f2fs/checkpoint.c | 2 +-
fs/f2fs/f2fs.h | 1 +
fs/f2fs/super.c | 7 +++++++
4 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 8088bd9..727373e 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -151,6 +151,8 @@ noextent_cache Disable an extent cache based on rb-tree explicitly, see
the above extent_cache mount option.
noinline_data Disable the inline data feature, inline data feature is
enabled by default.
+data_flush Enable data flushing during checkpoint in order to
+ persist data of regular and symlink.
================================================================================
DEBUGFS ENTRIES
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index a73909c..2fdf271 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -855,7 +855,7 @@ static int block_operations(struct f2fs_sb_info *sbi)
retry_flush_datas:
/* write all the dirty data pages */
- if (get_pages(sbi, F2FS_DIRTY_DATAS)) {
+ if (test_opt(sbi, DATA_FLUSH) && get_pages(sbi, F2FS_DIRTY_DATAS)) {
sync_dirty_inodes(sbi, FILE_INODE);
if (unlikely(f2fs_cp_error(sbi))) {
err = -EIO;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 4d44732..ee1f0a8 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -54,6 +54,7 @@
#define F2FS_MOUNT_FASTBOOT 0x00001000
#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
+#define F2FS_MOUNT_DATA_FLUSH 0x00008000
#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 051bce6..694e092 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -67,6 +67,7 @@ enum {
Opt_extent_cache,
Opt_noextent_cache,
Opt_noinline_data,
+ Opt_data_flush,
Opt_nodiscard,
Opt_err,
};
@@ -92,6 +93,7 @@ static match_table_t f2fs_tokens = {
{Opt_extent_cache, "extent_cache"},
{Opt_noextent_cache, "noextent_cache"},
{Opt_noinline_data, "noinline_data"},
+ {Opt_data_flush, "data_flush"},
{Opt_nodiscard, "nodiscard"},
{Opt_err, NULL},
};
@@ -411,6 +413,9 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_noinline_data:
clear_opt(sbi, INLINE_DATA);
break;
+ case Opt_data_flush:
+ clear_opt(sbi, DATA_FLUSH);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
@@ -694,6 +699,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",extent_cache");
else
seq_puts(seq, ",noextent_cache");
+ if (test_opt(sbi, DATA_FLUSH))
+ seq_puts(seq, ",data_flush");
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
return 0;
--
2.6.3
--
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