diff options
| author | Fan Li <fanofcode.li@samsung.com> | 2015-08-05 15:52:16 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-05 22:15:42 -0700 |
| commit | 759af1c9c16fec5323111b799ce25a3d8864df7e (patch) | |
| tree | c92f1022dd58aaf20d51742da74b886e91e701fc | |
| parent | e90c2d2850d9d034e814a328725a4b15878f0357 (diff) | |
f2fs: use extent cache to optimize f2fs_reserve_block
In some cases, we only need the block address when we call
f2fs_reserve_block,
other fields of struct dnode_of_data aren't necessary.
We can try extent cache first for such cases in order to speed up the
process.
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/data.c | 16 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
2 files changed, 16 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index f8f93db437ce..4fabdd47490a 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -263,6 +263,19 @@ int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) return err; } +int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) +{ + struct extent_info ei; + struct inode *inode = dn->inode; + + if (f2fs_lookup_extent_cache(inode, index, &ei)) { + dn->data_blkaddr = ei.blk + index - ei.fofs; + return 0; + } + + return f2fs_reserve_block(dn, index); +} + struct page *get_read_data_page(struct inode *inode, pgoff_t index, int rw) { struct address_space *mapping = inode->i_mapping; @@ -1383,7 +1396,8 @@ repeat: if (err) goto put_fail; } - err = f2fs_reserve_block(&dn, index); + + err = f2fs_get_block(&dn, index); if (err) goto put_fail; put_next: diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 34a524d007ec..09cb365a07cc 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1768,6 +1768,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *); void f2fs_submit_page_mbio(struct f2fs_io_info *); void set_data_blkaddr(struct dnode_of_data *); int reserve_new_block(struct dnode_of_data *); +int f2fs_get_block(struct dnode_of_data *, pgoff_t); int f2fs_reserve_block(struct dnode_of_data *, pgoff_t); struct page *get_read_data_page(struct inode *, pgoff_t, int); struct page *find_data_page(struct inode *, pgoff_t); |