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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-12 00:49:55 +0400 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-23 22:10:12 +0400 |
| commit | 4c521f493b625c7982cf2eae246e86c893f62dfa (patch) | |
| tree | cb88bac09865787eb17fb7e98854e25906729717 /fs/f2fs/checkpoint.c | |
| parent | 60979115a69e0e7916a1c1796f902264f1350977 (diff) | |
| download | linux-4c521f493b625c7982cf2eae246e86c893f62dfa.tar.xz | |
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/checkpoint.c')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 33 |
1 files changed, 28 insertions, 5 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: |