To improve recovery speed, f2fs try to readahead many contiguous blocks in warm
node segment, but for most time, abnormal power-off do not occur frequently, so
when mount a normal power-off f2fs image, by contrary ra so many blocks and then
invalid them will hurt the performance of mount.
It's better to just ra the first next-block for normal condition.
Signed-off-by: Chao Yu <[email protected]>
---
fs/f2fs/checkpoint.c | 29 ++++++++++++++---------------
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/recovery.c | 10 ++++++++--
3 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index aa2a21c..5eb4d1a 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -72,21 +72,6 @@ out:
return page;
}
-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(sbi), META_POR);
- return get_meta_page(sbi, index);
-}
-
static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
block_t blkaddr, int type)
{
@@ -181,6 +166,20 @@ out:
return blkno - start;
}
+void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct page *page;
+ bool readahead = false;
+
+ 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(sbi), META_POR);
+}
+
static int f2fs_write_meta_page(struct page *page,
struct writeback_control *wbc)
{
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index fc88e8a..b465896 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1423,8 +1423,8 @@ 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);
-struct page *get_meta_page_ra(struct f2fs_sb_info *, pgoff_t);
int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int);
+void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
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 9a93a6e..9160a37 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -170,13 +170,15 @@ 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);
+ ra_meta_pages(sbi, blkaddr, 1, META_POR);
+
while (1) {
struct fsync_inode_entry *entry;
if (blkaddr < MAIN_BLKADDR(sbi) || blkaddr >= MAX_BLKADDR(sbi))
return 0;
- page = get_meta_page_ra(sbi, blkaddr);
+ page = get_meta_page(sbi, blkaddr);
if (cp_ver != cpver_of_node(page))
break;
@@ -227,6 +229,8 @@ next:
/* check next segment */
blkaddr = next_blkaddr_of_node(page);
f2fs_put_page(page, 1);
+
+ ra_meta_pages_cond(sbi, blkaddr);
}
f2fs_put_page(page, 1);
return err;
@@ -436,7 +440,9 @@ static int recover_data(struct f2fs_sb_info *sbi,
if (blkaddr < MAIN_BLKADDR(sbi) || blkaddr >= MAX_BLKADDR(sbi))
break;
- page = get_meta_page_ra(sbi, blkaddr);
+ ra_meta_pages_cond(sbi, blkaddr);
+
+ page = get_meta_page(sbi, blkaddr);
if (cp_ver != cpver_of_node(page)) {
f2fs_put_page(page, 1);
--
2.1.2