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Code Issues Projects Releases Wiki Activity

f2fs: introduce new option for controlling data flush 

Add a new option 'data_flush' to enable data flush functionality.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

 Conflicts:
	Documentation/filesystems/f2fs.txt
This commit is contained in:
Chao Yu 2015-12-16 13:12:16 +08:00 committed by Jaegeuk Kim
parent 48adb63918
commit a72a8223f7
3 changed files with 37 additions and 0 deletions
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29
Documentation/filesystems/f2fs.txt
View File

@ -114,6 +114,35 @@ active_logs=%u Support configuring the number of active logs. In the
Default number is 6.
disable_ext_identify Disable the extension list configured by mkfs, so f2fs
does not aware of cold files such as media files.
inline_xattr Enable the inline xattrs feature.
inline_data Enable the inline data feature: New created small(<~3.4k)
files can be written into inode block.
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.
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,
recommend to enable this option.
nobarrier This option can be used if underlying storage guarantees
its cached data should be written to the novolatile area.
If this option is set, no cache_flush commands are issued
but f2fs still guarantees the write ordering of all the
data writes.
fastboot This option is used when a system wants to reduce mount
time as much as possible, even though normal performance
can be sacrificed.
extent_cache Enable an extent cache based on rb-tree, it can cache
as many as extent which map between contiguous logical
address and physical address per inode, resulting in
increasing the cache hit ratio. Set by default.
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 before checkpoint in order to
persist data of regular and symlink.
================================================================================
DEBUGFS ENTRIES

1
fs/f2fs/f2fs.h
View File

@ -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)

7
fs/f2fs/super.c
View File

@ -66,6 +66,7 @@ enum {
Opt_extent_cache,
Opt_noextent_cache,
Opt_noinline_data,
Opt_data_flush,
Opt_err,
};
@ -90,6 +91,7 @@ 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_err, NULL},
};
@ -405,6 +407,9 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_noinline_data:
clear_opt(sbi, INLINE_DATA);
break;
case Opt_data_flush:
set_opt(sbi, DATA_FLUSH);
break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
@ -686,6 +691,8 @@ 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;