diff options
| author | Yohan Joung <jyh429@gmail.com> | 2025-03-17 22:36:11 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-03-18 01:26:04 +0000 |
| commit | 351bc761338d9be29065c2b99e603bab336792b7 (patch) | |
| tree | 404aef0ff252a5d8b62d65f86be1ee94b491f4bc | |
| parent | f098aeba04c9328571567dca45159358a250240c (diff) | |
f2fs: optimize f2fs DIO overwrites
this is unnecessary when we know we are overwriting already allocated
blocks and the overhead of starting a transaction can be significant
especially for multithreaded workloads doing small writes.
Signed-off-by: Yohan Joung <yohan.joung@sk.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/data.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index d872f785a996..d99ec9370b1d 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -4181,7 +4181,13 @@ static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, map.m_next_pgofs = &next_pgofs; map.m_seg_type = f2fs_rw_hint_to_seg_type(F2FS_I_SB(inode), inode->i_write_hint); - if (flags & IOMAP_WRITE) + + /* + * If the blocks being overwritten are already allocated, + * f2fs_map_lock and f2fs_balance_fs are not necessary. + */ + if ((flags & IOMAP_WRITE) && + !f2fs_overwrite_io(inode, offset, length)) map.m_may_create = true; err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DIO); |