Commit e7547dac authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: refactor extent_cache to support for read and more 



This patch prepares extent_cache to be ready for addition.

Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 749d543c

fs/f2fs/data.c

+10 −10
Original line number Diff line number Diff line
@@ -1126,7 +1126,7 @@ void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) 
{

	dn->data_blkaddr = blkaddr;

	f2fs_set_data_blkaddr(dn);

	f2fs_update_extent_cache(dn);

	f2fs_update_read_extent_cache(dn);

}



/* dn->ofs_in_node will be returned with up-to-date last block pointer */
@@ -1195,7 +1195,7 @@ int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) 
	struct extent_info ei = {0, };

	struct inode *inode = dn->inode;



	if (f2fs_lookup_extent_cache(inode, index, &ei)) {

	if (f2fs_lookup_read_extent_cache(inode, index, &ei)) {

		dn->data_blkaddr = ei.blk + index - ei.fofs;

		return 0;

	}
@@ -1217,7 +1217,7 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index, 
	if (!page)

		return ERR_PTR(-ENOMEM);



	if (f2fs_lookup_extent_cache(inode, index, &ei)) {

	if (f2fs_lookup_read_extent_cache(inode, index, &ei)) {

		dn.data_blkaddr = ei.blk + index - ei.fofs;

		if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,

						DATA_GENERIC_ENHANCE_READ)) {
@@ -1485,7 +1485,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, 
	pgofs =	(pgoff_t)map->m_lblk;

	end = pgofs + maxblocks;



	if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {

	if (!create && f2fs_lookup_read_extent_cache(inode, pgofs, &ei)) {

		if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&

							map->m_may_create)

			goto next_dnode;
@@ -1695,7 +1695,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, 
		if (map->m_flags & F2FS_MAP_MAPPED) {

			unsigned int ofs = start_pgofs - map->m_lblk;



			f2fs_update_extent_cache_range(&dn,

			f2fs_update_read_extent_cache_range(&dn,

				start_pgofs, map->m_pblk + ofs,

				map->m_len - ofs);

		}
@@ -1740,7 +1740,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, 
		if (map->m_flags & F2FS_MAP_MAPPED) {

			unsigned int ofs = start_pgofs - map->m_lblk;



			f2fs_update_extent_cache_range(&dn,

			f2fs_update_read_extent_cache_range(&dn,

				start_pgofs, map->m_pblk + ofs,

				map->m_len - ofs);

		}
@@ -2201,7 +2201,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, 
	if (f2fs_cluster_is_empty(cc))

		goto out;



	if (f2fs_lookup_extent_cache(inode, start_idx, &ei))

	if (f2fs_lookup_read_extent_cache(inode, start_idx, &ei))

		from_dnode = false;



	if (!from_dnode)
@@ -2635,7 +2635,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio) 
		set_new_dnode(&dn, inode, NULL, NULL, 0);



	if (need_inplace_update(fio) &&

			f2fs_lookup_extent_cache(inode, page->index, &ei)) {

	    f2fs_lookup_read_extent_cache(inode, page->index, &ei)) {

		fio->old_blkaddr = ei.blk + page->index - ei.fofs;



		if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
@@ -3359,7 +3359,7 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi, 
	} else if (locked) {

		err = f2fs_get_block(&dn, index);

	} else {

		if (f2fs_lookup_extent_cache(inode, index, &ei)) {

		if (f2fs_lookup_read_extent_cache(inode, index, &ei)) {

			dn.data_blkaddr = ei.blk + index - ei.fofs;

		} else {

			/* hole case */
@@ -3400,7 +3400,7 @@ static int __find_data_block(struct inode *inode, pgoff_t index, 


	set_new_dnode(&dn, inode, ipage, ipage, 0);



	if (f2fs_lookup_extent_cache(inode, index, &ei)) {

	if (f2fs_lookup_read_extent_cache(inode, index, &ei)) {

		dn.data_blkaddr = ei.blk + index - ei.fofs;

	} else {

		/* hole case */

fs/f2fs/debug.c

+44 −21
Original line number Diff line number Diff line
@@ -72,15 +72,23 @@ static void update_general_status(struct f2fs_sb_info *sbi) 
	si->main_area_zones = si->main_area_sections /

				le32_to_cpu(raw_super->secs_per_zone);



	/* validation check of the segment numbers */

	/* general extent cache stats */

	for (i = 0; i < NR_EXTENT_CACHES; i++) {

		struct extent_tree_info *eti = &sbi->extent_tree[i];



		si->hit_cached[i] = atomic64_read(&sbi->read_hit_cached[i]);

		si->hit_rbtree[i] = atomic64_read(&sbi->read_hit_rbtree[i]);

		si->total_ext[i] = atomic64_read(&sbi->total_hit_ext[i]);

		si->hit_total[i] = si->hit_cached[i] + si->hit_rbtree[i];

		si->ext_tree[i] = atomic_read(&eti->total_ext_tree);

		si->zombie_tree[i] = atomic_read(&eti->total_zombie_tree);

		si->ext_node[i] = atomic_read(&eti->total_ext_node);

	}

	/* read extent_cache only */

	si->hit_largest = atomic64_read(&sbi->read_hit_largest);

	si->hit_cached = atomic64_read(&sbi->read_hit_cached);

	si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree);

	si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;

	si->total_ext = atomic64_read(&sbi->total_hit_ext);

	si->ext_tree = atomic_read(&sbi->total_ext_tree);

	si->zombie_tree = atomic_read(&sbi->total_zombie_tree);

	si->ext_node = atomic_read(&sbi->total_ext_node);

	si->hit_total[EX_READ] += si->hit_largest;



	/* validation check of the segment numbers */

	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);

	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);

	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
@@ -294,10 +302,16 @@ static void update_mem_info(struct f2fs_sb_info *sbi) 
				sizeof(struct nat_entry_set);

	for (i = 0; i < MAX_INO_ENTRY; i++)

		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);

	si->cache_mem += atomic_read(&sbi->total_ext_tree) *



	for (i = 0; i < NR_EXTENT_CACHES; i++) {

		struct extent_tree_info *eti = &sbi->extent_tree[i];



		si->ext_mem[i] = atomic_read(&eti->total_ext_tree) *

						sizeof(struct extent_tree);

	si->cache_mem += atomic_read(&sbi->total_ext_node) *

		si->ext_mem[i] += atomic_read(&eti->total_ext_node) *

						sizeof(struct extent_node);

		si->cache_mem += si->ext_mem[i];

	}



	si->page_mem = 0;

	if (sbi->node_inode) {
@@ -490,16 +504,18 @@ static int stat_show(struct seq_file *s, void *v) 
				si->bg_node_blks);

		seq_printf(s, "BG skip : IO: %u, Other: %u\n",

				si->io_skip_bggc, si->other_skip_bggc);

		seq_puts(s, "\nExtent Cache:\n");

		seq_puts(s, "\nExtent Cache (Read):\n");

		seq_printf(s, "  - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",

				si->hit_largest, si->hit_cached,

				si->hit_rbtree);

				si->hit_largest, si->hit_cached[EX_READ],

				si->hit_rbtree[EX_READ]);

		seq_printf(s, "  - Hit Ratio: %llu%% (%llu / %llu)\n",

				!si->total_ext ? 0 :

				div64_u64(si->hit_total * 100, si->total_ext),

				si->hit_total, si->total_ext);

				!si->total_ext[EX_READ] ? 0 :

				div64_u64(si->hit_total[EX_READ] * 100,

				si->total_ext[EX_READ]),

				si->hit_total[EX_READ], si->total_ext[EX_READ]);

		seq_printf(s, "  - Inner Struct Count: tree: %d(%d), node: %d\n",

				si->ext_tree, si->zombie_tree, si->ext_node);

				si->ext_tree[EX_READ], si->zombie_tree[EX_READ],

				si->ext_node[EX_READ]);

		seq_puts(s, "\nBalancing F2FS Async:\n");

		seq_printf(s, "  - DIO (R: %4d, W: %4d)\n",

			   si->nr_dio_read, si->nr_dio_write);
@@ -566,8 +582,10 @@ static int stat_show(struct seq_file *s, void *v) 
			(si->base_mem + si->cache_mem + si->page_mem) >> 10);

		seq_printf(s, "  - static: %llu KB\n",

				si->base_mem >> 10);

		seq_printf(s, "  - cached: %llu KB\n",

		seq_printf(s, "  - cached all: %llu KB\n",

				si->cache_mem >> 10);

		seq_printf(s, "  - read extent cache: %llu KB\n",

				si->ext_mem[EX_READ] >> 10);

		seq_printf(s, "  - paged : %llu KB\n",

				si->page_mem >> 10);

	}
@@ -600,10 +618,15 @@ int f2fs_build_stats(struct f2fs_sb_info *sbi) 
	si->sbi = sbi;

	sbi->stat_info = si;



	atomic64_set(&sbi->total_hit_ext, 0);

	atomic64_set(&sbi->read_hit_rbtree, 0);

	/* general extent cache stats */

	for (i = 0; i < NR_EXTENT_CACHES; i++) {

		atomic64_set(&sbi->total_hit_ext[i], 0);

		atomic64_set(&sbi->read_hit_rbtree[i], 0);

		atomic64_set(&sbi->read_hit_cached[i], 0);

	}



	/* read extent_cache only */

	atomic64_set(&sbi->read_hit_largest, 0);

	atomic64_set(&sbi->read_hit_cached, 0);



	atomic_set(&sbi->inline_xattr, 0);

	atomic_set(&sbi->inline_inode, 0);

fs/f2fs/extent_cache.c

+276 −187

File changed.

Preview size limit exceeded, changes collapsed.

fs/f2fs/f2fs.h

+77 −42
Original line number Diff line number Diff line
@@ -596,16 +596,22 @@ enum { 
/* dirty segments threshold for triggering CP */

#define DEFAULT_DIRTY_THRESHOLD		4



#define RECOVERY_MAX_RA_BLOCKS		BIO_MAX_VECS

#define RECOVERY_MIN_RA_BLOCKS		1



#define F2FS_ONSTACK_PAGES	16	/* nr of onstack pages */



/* for in-memory extent cache entry */

#define F2FS_MIN_EXTENT_LEN	64	/* minimum extent length */



/* number of extent info in extent cache we try to shrink */

#define READ_EXTENT_CACHE_SHRINK_NUMBER	128



#define RECOVERY_MAX_RA_BLOCKS		BIO_MAX_VECS

#define RECOVERY_MIN_RA_BLOCKS		1



#define F2FS_ONSTACK_PAGES	16	/* nr of onstack pages */

/* extent cache type */

enum extent_type {

	EX_READ,

	NR_EXTENT_CACHES,

};



struct rb_entry {

	struct rb_node rb_node;		/* rb node located in rb-tree */
@@ -621,11 +627,18 @@ struct rb_entry { 
struct extent_info {

	unsigned int fofs;		/* start offset in a file */

	unsigned int len;		/* length of the extent */

	block_t blk;			/* start block address of the extent */

	union {

		/* read extent_cache */

		struct {

			/* start block address of the extent */

			block_t blk;

#ifdef CONFIG_F2FS_FS_COMPRESSION

	unsigned int c_len;		/* physical extent length of compressed blocks */

			/* physical extent length of compressed blocks */

			unsigned int c_len;

#endif

		};

	};

};



struct extent_node {

	struct rb_node rb_node;		/* rb node located in rb-tree */
@@ -636,13 +649,25 @@ struct extent_node { 


struct extent_tree {

	nid_t ino;			/* inode number */

	enum extent_type type;		/* keep the extent tree type */

	struct rb_root_cached root;	/* root of extent info rb-tree */

	struct extent_node *cached_en;	/* recently accessed extent node */

	struct extent_info largest;	/* largested extent info */

	struct list_head list;		/* to be used by sbi->zombie_list */

	rwlock_t lock;			/* protect extent info rb-tree */

	atomic_t node_cnt;		/* # of extent node in rb-tree*/

	bool largest_updated;		/* largest extent updated */

	struct extent_info largest;	/* largest cached extent for EX_READ */

};



struct extent_tree_info {

	struct radix_tree_root extent_tree_root;/* cache extent cache entries */

	struct mutex extent_tree_lock;	/* locking extent radix tree */

	struct list_head extent_list;		/* lru list for shrinker */

	spinlock_t extent_lock;			/* locking extent lru list */

	atomic_t total_ext_tree;		/* extent tree count */

	struct list_head zombie_list;		/* extent zombie tree list */

	atomic_t total_zombie_tree;		/* extent zombie tree count */

	atomic_t total_ext_node;		/* extent info count */

};



/*
@@ -805,7 +830,8 @@ struct f2fs_inode_info { 
	struct list_head dirty_list;	/* dirty list for dirs and files */

	struct list_head gdirty_list;	/* linked in global dirty list */

	struct task_struct *atomic_write_task;	/* store atomic write task */

	struct extent_tree *extent_tree;	/* cached extent_tree entry */

	struct extent_tree *extent_tree[NR_EXTENT_CACHES];

					/* cached extent_tree entry */

	struct inode *cow_inode;	/* copy-on-write inode for atomic write */



	/* avoid racing between foreground op and gc */
@@ -1626,14 +1652,7 @@ struct f2fs_sb_info { 
	struct mutex flush_lock;		/* for flush exclusion */



	/* for extent tree cache */

	struct radix_tree_root extent_tree_root;/* cache extent cache entries */

	struct mutex extent_tree_lock;	/* locking extent radix tree */

	struct list_head extent_list;		/* lru list for shrinker */

	spinlock_t extent_lock;			/* locking extent lru list */

	atomic_t total_ext_tree;		/* extent tree count */

	struct list_head zombie_list;		/* extent zombie tree list */

	atomic_t total_zombie_tree;		/* extent zombie tree count */

	atomic_t total_ext_node;		/* extent info count */

	struct extent_tree_info extent_tree[NR_EXTENT_CACHES];



	/* basic filesystem units */

	unsigned int log_sectors_per_block;	/* log2 sectors per block */
@@ -1718,10 +1737,14 @@ struct f2fs_sb_info { 
	unsigned int segment_count[2];		/* # of allocated segments */

	unsigned int block_count[2];		/* # of allocated blocks */

	atomic_t inplace_count;		/* # of inplace update */

	atomic64_t total_hit_ext;		/* # of lookup extent cache */

	atomic64_t read_hit_rbtree;		/* # of hit rbtree extent node */

	atomic64_t read_hit_largest;		/* # of hit largest extent node */

	atomic64_t read_hit_cached;		/* # of hit cached extent node */

	/* # of lookup extent cache */

	atomic64_t total_hit_ext[NR_EXTENT_CACHES];

	/* # of hit rbtree extent node */

	atomic64_t read_hit_rbtree[NR_EXTENT_CACHES];

	/* # of hit cached extent node */

	atomic64_t read_hit_cached[NR_EXTENT_CACHES];

	/* # of hit largest extent node in read extent cache */

	atomic64_t read_hit_largest;

	atomic_t inline_xattr;			/* # of inline_xattr inodes */

	atomic_t inline_inode;			/* # of inline_data inodes */

	atomic_t inline_dir;			/* # of inline_dentry inodes */
@@ -3823,9 +3846,17 @@ struct f2fs_stat_info { 
	struct f2fs_sb_info *sbi;

	int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;

	int main_area_segs, main_area_sections, main_area_zones;

	unsigned long long hit_largest, hit_cached, hit_rbtree;

	unsigned long long hit_total, total_ext;

	int ext_tree, zombie_tree, ext_node;

	unsigned long long hit_cached[NR_EXTENT_CACHES];

	unsigned long long hit_rbtree[NR_EXTENT_CACHES];

	unsigned long long total_ext[NR_EXTENT_CACHES];

	unsigned long long hit_total[NR_EXTENT_CACHES];

	int ext_tree[NR_EXTENT_CACHES];

	int zombie_tree[NR_EXTENT_CACHES];

	int ext_node[NR_EXTENT_CACHES];

	/* to count memory footprint */

	unsigned long long ext_mem[NR_EXTENT_CACHES];

	/* for read extent cache */

	unsigned long long hit_largest;

	int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta;

	int ndirty_data, ndirty_qdata;

	unsigned int ndirty_dirs, ndirty_files, nquota_files, ndirty_all;
@@ -3884,10 +3915,10 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 
#define stat_other_skip_bggc_count(sbi)	((sbi)->other_skip_bggc++)

#define stat_inc_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]++)

#define stat_dec_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]--)

#define stat_inc_total_hit(sbi)		(atomic64_inc(&(sbi)->total_hit_ext))

#define stat_inc_rbtree_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_rbtree))

#define stat_inc_total_hit(sbi, type)		(atomic64_inc(&(sbi)->total_hit_ext[type]))

#define stat_inc_rbtree_node_hit(sbi, type)	(atomic64_inc(&(sbi)->read_hit_rbtree[type]))

#define stat_inc_largest_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_largest))

#define stat_inc_cached_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_cached))

#define stat_inc_cached_node_hit(sbi, type)	(atomic64_inc(&(sbi)->read_hit_cached[type]))

#define stat_inc_inline_xattr(inode)					\

	do {								\

		if (f2fs_has_inline_xattr(inode))			\
@@ -4010,10 +4041,10 @@ void f2fs_update_sit_info(struct f2fs_sb_info *sbi); 
#define stat_other_skip_bggc_count(sbi)			do { } while (0)

#define stat_inc_dirty_inode(sbi, type)			do { } while (0)

#define stat_dec_dirty_inode(sbi, type)			do { } while (0)

#define stat_inc_total_hit(sbi)				do { } while (0)

#define stat_inc_rbtree_node_hit(sbi)			do { } while (0)

#define stat_inc_total_hit(sbi, type)			do { } while (0)

#define stat_inc_rbtree_node_hit(sbi, type)		do { } while (0)

#define stat_inc_largest_node_hit(sbi)			do { } while (0)

#define stat_inc_cached_node_hit(sbi)			do { } while (0)

#define stat_inc_cached_node_hit(sbi, type)		do { } while (0)

#define stat_inc_inline_xattr(inode)			do { } while (0)

#define stat_dec_inline_xattr(inode)			do { } while (0)

#define stat_inc_inline_inode(inode)			do { } while (0)
@@ -4119,20 +4150,23 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root, 
		bool force, bool *leftmost);

bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,

				struct rb_root_cached *root, bool check_key);

unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink);

void f2fs_init_extent_tree(struct inode *inode, struct page *ipage);

void f2fs_drop_extent_tree(struct inode *inode);

unsigned int f2fs_destroy_extent_node(struct inode *inode);

void f2fs_destroy_extent_node(struct inode *inode);

void f2fs_destroy_extent_tree(struct inode *inode);

bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs,

			struct extent_info *ei);

void f2fs_update_extent_cache(struct dnode_of_data *dn);

void f2fs_update_extent_cache_range(struct dnode_of_data *dn,

			pgoff_t fofs, block_t blkaddr, unsigned int len);

void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi);

int __init f2fs_create_extent_cache(void);

void f2fs_destroy_extent_cache(void);



/* read extent cache ops */

bool f2fs_lookup_read_extent_cache(struct inode *inode, pgoff_t pgofs,

			struct extent_info *ei);

void f2fs_update_read_extent_cache(struct dnode_of_data *dn);

void f2fs_update_read_extent_cache_range(struct dnode_of_data *dn,

			pgoff_t fofs, block_t blkaddr, unsigned int len);

unsigned int f2fs_shrink_read_extent_tree(struct f2fs_sb_info *sbi,

			int nr_shrink);



/*

 * sysfs.c

 */
@@ -4202,9 +4236,9 @@ int f2fs_write_multi_pages(struct compress_ctx *cc, 
						struct writeback_control *wbc,

						enum iostat_type io_type);

int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index);

void f2fs_update_extent_tree_range_compressed(struct inode *inode,

				pgoff_t fofs, block_t blkaddr, unsigned int llen,

				unsigned int c_len);

void f2fs_update_read_extent_tree_range_compressed(struct inode *inode,

				pgoff_t fofs, block_t blkaddr,

				unsigned int llen, unsigned int c_len);

int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,

				unsigned nr_pages, sector_t *last_block_in_bio,

				bool is_readahead, bool for_write);
@@ -4285,9 +4319,10 @@ static inline bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, 
static inline void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi,

							nid_t ino) { }

#define inc_compr_inode_stat(inode)		do { } while (0)

static inline void f2fs_update_extent_tree_range_compressed(struct inode *inode,

				pgoff_t fofs, block_t blkaddr, unsigned int llen,

				unsigned int c_len) { }

static inline void f2fs_update_read_extent_tree_range_compressed(

				struct inode *inode,

				pgoff_t fofs, block_t blkaddr,

				unsigned int llen, unsigned int c_len) { }

#endif



static inline int set_compress_context(struct inode *inode)

fs/f2fs/file.c

+4 −4
Original line number Diff line number Diff line
@@ -618,7 +618,7 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count) 
		 */

		fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),

							dn->inode) + ofs;

		f2fs_update_extent_cache_range(dn, fofs, 0, len);

		f2fs_update_read_extent_cache_range(dn, fofs, 0, len);

		dec_valid_block_count(sbi, dn->inode, nr_free);

	}

	dn->ofs_in_node = ofs;
@@ -1496,7 +1496,7 @@ static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start, 
		f2fs_set_data_blkaddr(dn);

	}



	f2fs_update_extent_cache_range(dn, start, 0, index - start);

	f2fs_update_read_extent_cache_range(dn, start, 0, index - start);



	return ret;

}
@@ -2558,7 +2558,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, 
	struct f2fs_map_blocks map = { .m_next_extent = NULL,

					.m_seg_type = NO_CHECK_TYPE,

					.m_may_create = false };

	struct extent_info ei = {0, 0, 0};

	struct extent_info ei = {0, };

	pgoff_t pg_start, pg_end, next_pgofs;

	unsigned int blk_per_seg = sbi->blocks_per_seg;

	unsigned int total = 0, sec_num;
@@ -2590,7 +2590,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, 
	 * lookup mapping info in extent cache, skip defragmenting if physical

	 * block addresses are continuous.

	 */

	if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {

	if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) {

		if (ei.fofs + ei.len >= pg_end)

			goto out;

	}