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Date: Sun, 14 Sep 2014 15:14:21 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 07/10] 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.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/checkpoint.c | 11 ++++++++--
fs/f2fs/f2fs.h | 5 +++--
fs/f2fs/recovery.c | 59 +++++++++++++++++++++++++---------------------------
fs/f2fs/segment.h | 5 +++--
4 files changed, 43 insertions(+), 37 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 7262d99..d1ed889 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -82,6 +82,8 @@ 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)->main_blkaddr + sbi->user_block_count;
default:
BUG();
}
@@ -90,11 +92,11 @@ 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;
+ block_t blkno = start;
int max_blks = get_max_meta_blks(sbi, type);
struct f2fs_io_info fio = {
@@ -128,6 +130,11 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type)
/* get ssa/cp block addr */
blk_addr = blkno;
break;
+ case META_POR:
+ if (unlikely(blkno >= max_blks))
+ goto out;
+ blk_addr = blkno;
+ break;
default:
BUG();
}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 4f84d2a..48d7d46 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 */
@@ -1291,7 +1292,7 @@ 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);
+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 3736728..6f7fbfa 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -173,7 +173,7 @@ 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;
@@ -181,20 +181,19 @@ 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 > TOTAL_BLKS(sbi))
+ break;
- lock_page(page);
+ page = get_meta_page(sbi, blkaddr);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+
+ ra_meta_pages(sbi, next_blkaddr_of_node(page),
+ MAX_BIO_BLOCKS(max_hw_blocks(sbi)), META_POR);
if (cp_ver != cpver_of_node(page))
break;
@@ -243,11 +242,9 @@ 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;
}
@@ -427,7 +424,7 @@ 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;
@@ -435,21 +432,19 @@ 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 > TOTAL_BLKS(sbi))
+ break;
- lock_page(page);
+ page = get_meta_page(sbi, blkaddr);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+
+ ra_meta_pages(sbi, next_blkaddr_of_node(page),
+ MAX_BIO_BLOCKS(max_hw_blocks(sbi)), META_POR);
if (cp_ver != cpver_of_node(page))
break;
@@ -477,11 +472,9 @@ 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);
-
+ f2fs_put_page(page, 1);
if (!err)
allocate_new_segments(sbi);
return err;
@@ -527,6 +520,10 @@ 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 013aed2..c6f37f2 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;
--
1.8.5.2 (Apple Git-48)
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