From: Huajun Li <[email protected]>
f2fs inode is so large, so small files can be stored directly in the inode,
rather than just storing a single block address and storing the data elsewhere.
This patch set makes files less than ~3.4K store directly in inode block.
a) space saving
Test with kernel src(without repo data), it can save about 10% space
with this patch set;
b) performance
Test this patch set with iozone, there is no obvious performance difference
with the results of disabling this feature.
V2: - Update f2fs_reserve_block() according to comments on V1
- Add function f2fs_may_inline() to check whether the file meet
inline requirements
- Try to write inline data to normal data block before clearing it
from inode block
- Change lock scope while converting inline data
- Add inline_data description to f2fs documentation
Huajun Li (6):
f2fs: Add flags and helpers to support inline data
f2fs: Add a new mount option: inline_data
f2fs: Add a new function: f2fs_reserve_block()
f2fs: Key functions to handle inline data
f2fs: Handle inline data operations
f2fs: update f2fs Documentation
Documentation/filesystems/f2fs.txt | 2 +
fs/f2fs/Makefile | 2 +-
fs/f2fs/data.c | 97 +++++++++++++-------
fs/f2fs/f2fs.h | 23 +++++
fs/f2fs/file.c | 81 +++++++++--------
fs/f2fs/inline.c | 172 ++++++++++++++++++++++++++++++++++++
fs/f2fs/super.c | 8 +-
include/linux/f2fs_fs.h | 8 ++
8 files changed, 325 insertions(+), 68 deletions(-)
create mode 100644 fs/f2fs/inline.c
--
1.7.9.5
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