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| author | Chao Yu <chao2.yu@samsung.com> | 2014-12-08 15:02:52 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-12-08 14:19:09 -0800 |
| commit | 635aee1fefef921ae4124b127fced62ea6008839 (patch) | |
| tree | 92559fbad6271bbb0db0c7047b0e6bb370a9f1bc /fs/f2fs/checkpoint.c | |
| parent | 66b00c186764e29765e8962a03556c329dee48e5 (diff) | |
| download | linux-635aee1fefef921ae4124b127fced62ea6008839.tar.bz2 | |
f2fs: avoid to ra unneeded blocks in recover flow
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 <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 | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index b2d5431d6850..e6c271fefaca 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) { |