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authorJaegeuk Kim <jaegeuk@kernel.org>2014-09-11 13:49:55 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2014-09-23 11:10:12 -0700
commit4c521f493b625c7982cf2eae246e86c893f62dfa (patch)
treecb88bac09865787eb17fb7e98854e25906729717 /fs/f2fs
parent60979115a69e0e7916a1c1796f902264f1350977 (diff)
downloadlinux-4c521f493b625c7982cf2eae246e86c893f62dfa.tar.bz2
f2fs: use meta_inode cache to improve roll-forward speed
Previously, all the dnode pages should be read during the roll-forward recovery. Even worsely, whole the chain was traversed twice. This patch removes that redundant and costly read operations by using page cache of meta_inode and readahead function as well. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/checkpoint.c33
-rw-r--r--fs/f2fs/f2fs.h6
-rw-r--r--fs/f2fs/recovery.c56
-rw-r--r--fs/f2fs/segment.h5
4 files changed, 58 insertions, 42 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index d44d287cdae9..a1786d680906 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -72,7 +72,23 @@ out:
return page;
}
-static inline int get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
+struct page *get_meta_page_ra(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ bool readahead = false;
+ struct page *page;
+
+ page = find_get_page(META_MAPPING(sbi), index);
+ if (!page || (page && !PageUptodate(page)))
+ readahead = true;
+ f2fs_put_page(page, 0);
+
+ if (readahead)
+ ra_meta_pages(sbi, index,
+ MAX_BIO_BLOCKS(max_hw_blocks(sbi)), META_POR);
+ return get_meta_page(sbi, index);
+}
+
+static inline block_t get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
{
switch (type) {
case META_NAT:
@@ -82,6 +98,8 @@ static inline int get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
case META_SSA:
case META_CP:
return 0;
+ case META_POR:
+ return SM_I(sbi)->seg0_blkaddr + TOTAL_BLKS(sbi);
default:
BUG();
}
@@ -90,12 +108,13 @@ static inline int get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
/*
* Readahead CP/NAT/SIT/SSA pages
*/
-int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type)
+int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
{
block_t prev_blk_addr = 0;
struct page *page;
- int blkno = start;
- int max_blks = get_max_meta_blks(sbi, type);
+ block_t blkno = start;
+ block_t max_blks = get_max_meta_blks(sbi, type);
+ block_t min_blks = SM_I(sbi)->seg0_blkaddr;
struct f2fs_io_info fio = {
.type = META,
@@ -125,7 +144,11 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type)
break;
case META_SSA:
case META_CP:
- /* get ssa/cp block addr */
+ case META_POR:
+ if (unlikely(blkno >= max_blks))
+ goto out;
+ if (unlikely(blkno < min_blks))
+ goto out;
blk_addr = blkno;
break;
default:
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 8efa170352ff..b6439c3d1744 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -103,7 +103,8 @@ enum {
META_CP,
META_NAT,
META_SIT,
- META_SSA
+ META_SSA,
+ META_POR,
};
/* for the list of ino */
@@ -1294,7 +1295,8 @@ void destroy_segment_manager_caches(void);
*/
struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
-int ra_meta_pages(struct f2fs_sb_info *, int, int, int);
+struct page *get_meta_page_ra(struct f2fs_sb_info *, pgoff_t);
+int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int);
long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index e587ee128e17..7049a3adc409 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -138,7 +138,7 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
{
unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
struct curseg_info *curseg;
- struct page *page;
+ struct page *page = NULL;
block_t blkaddr;
int err = 0;
@@ -146,20 +146,14 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- /* read node page */
- page = alloc_page(GFP_F2FS_ZERO);
- if (!page)
- return -ENOMEM;
- lock_page(page);
-
while (1) {
struct fsync_inode_entry *entry;
- err = f2fs_submit_page_bio(sbi, page, blkaddr, READ_SYNC);
- if (err)
- return err;
+ if (blkaddr < SM_I(sbi)->main_blkaddr ||
+ blkaddr >= (SM_I(sbi)->seg0_blkaddr + TOTAL_BLKS(sbi)))
+ return 0;
- lock_page(page);
+ page = get_meta_page_ra(sbi, blkaddr);
if (cp_ver != cpver_of_node(page))
break;
@@ -202,11 +196,9 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
next:
/* check next segment */
blkaddr = next_blkaddr_of_node(page);
+ f2fs_put_page(page, 1);
}
-
- unlock_page(page);
- __free_pages(page, 0);
-
+ f2fs_put_page(page, 1);
return err;
}
@@ -400,7 +392,7 @@ static int recover_data(struct f2fs_sb_info *sbi,
{
unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
struct curseg_info *curseg;
- struct page *page;
+ struct page *page = NULL;
int err = 0;
block_t blkaddr;
@@ -408,32 +400,29 @@ static int recover_data(struct f2fs_sb_info *sbi,
curseg = CURSEG_I(sbi, type);
blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- /* read node page */
- page = alloc_page(GFP_F2FS_ZERO);
- if (!page)
- return -ENOMEM;
-
- lock_page(page);
-
while (1) {
struct fsync_inode_entry *entry;
- err = f2fs_submit_page_bio(sbi, page, blkaddr, READ_SYNC);
- if (err)
- return err;
+ if (blkaddr < SM_I(sbi)->main_blkaddr ||
+ blkaddr >= (SM_I(sbi)->seg0_blkaddr + TOTAL_BLKS(sbi)))
+ break;
- lock_page(page);
+ page = get_meta_page_ra(sbi, blkaddr);
- if (cp_ver != cpver_of_node(page))
+ if (cp_ver != cpver_of_node(page)) {
+ f2fs_put_page(page, 1);
break;
+ }
entry = get_fsync_inode(head, ino_of_node(page));
if (!entry)
goto next;
err = do_recover_data(sbi, entry->inode, page, blkaddr);
- if (err)
+ if (err) {
+ f2fs_put_page(page, 1);
break;
+ }
if (entry->blkaddr == blkaddr) {
iput(entry->inode);
@@ -443,11 +432,8 @@ static int recover_data(struct f2fs_sb_info *sbi,
next:
/* check next segment */
blkaddr = next_blkaddr_of_node(page);
+ f2fs_put_page(page, 1);
}
-
- unlock_page(page);
- __free_pages(page, 0);
-
if (!err)
allocate_new_segments(sbi);
return err;
@@ -493,6 +479,10 @@ out:
destroy_fsync_dnodes(&inode_list);
kmem_cache_destroy(fsync_entry_slab);
+ /* truncate meta pages to be used by the recovery */
+ truncate_inode_pages_range(META_MAPPING(sbi),
+ SM_I(sbi)->main_blkaddr << PAGE_CACHE_SHIFT, -1);
+
if (err) {
truncate_inode_pages_final(NODE_MAPPING(sbi));
truncate_inode_pages_final(META_MAPPING(sbi));
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 013aed2f3539..c6f37f2fe50e 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -87,6 +87,7 @@
(BITS_TO_LONGS(nr) * sizeof(unsigned long))
#define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segments)
#define TOTAL_SECS(sbi) (sbi->total_sections)
+#define TOTAL_BLKS(sbi) (SM_I(sbi)->segment_count << sbi->log_blocks_per_seg)
#define SECTOR_FROM_BLOCK(sbi, blk_addr) \
(((sector_t)blk_addr) << (sbi)->log_sectors_per_block)
@@ -553,7 +554,7 @@ static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
- block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
+ block_t total_blks = TOTAL_BLKS(sbi);
block_t start_addr = sm_info->seg0_blkaddr;
block_t end_addr = start_addr + total_blks - 1;
BUG_ON(blk_addr < start_addr);
@@ -606,7 +607,7 @@ static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
- block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
+ block_t total_blks = TOTAL_BLKS(sbi);
block_t start_addr = sm_info->seg0_blkaddr;
block_t end_addr = start_addr + total_blks - 1;