Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 759af1c9 authored by Fan Li's avatar Fan Li Committed by Jaegeuk Kim
Browse files

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: default avatarFan li <fanofcode.li@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent e90c2d28

fs/f2fs/data.c

+15 −1
Original line number Diff line number Diff line
@@ -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 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, 
		if (err)

			goto put_fail;

	}

	err = f2fs_reserve_block(&dn, index);



	err = f2fs_get_block(&dn, index);

	if (err)

		goto put_fail;

put_next:

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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);