diff options
| author | Chao Yu <chao2.yu@samsung.com> | 2014-12-09 14:21:46 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-01-09 17:02:23 -0800 |
| commit | 3fa06d7bc9f579bd180e879fd1c9bdb6b1b0d9b7 (patch) | |
| tree | dfcbadc6e9efc76a17413c0ed3dc7cf0f70469a8 /fs/f2fs/segment.c | |
| parent | 5df1f1da7a148c4a14d035b49c4d89790f59a57a (diff) | |
| download | linux-3fa06d7bc9f579bd180e879fd1c9bdb6b1b0d9b7.tar.bz2 | |
f2fs: readahead contiguous current summary blocks in checkpoint
Let's add readahead code for reading contiguous compact/normal summary blocks
in checkpoint, then we will gain better performance in mount procedure.
Changes from v1
o remove inappropriate 'unlikely' in npages_for_summary_flush.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 3791fa93dc7b..c950c9318e8e 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -725,7 +725,7 @@ static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, /* * Calculate the number of current summary pages for writing */ -int npages_for_summary_flush(struct f2fs_sb_info *sbi) +int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra) { int valid_sum_count = 0; int i, sum_in_page; @@ -733,8 +733,13 @@ int npages_for_summary_flush(struct f2fs_sb_info *sbi) for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { if (sbi->ckpt->alloc_type[i] == SSR) valid_sum_count += sbi->blocks_per_seg; - else - valid_sum_count += curseg_blkoff(sbi, i); + else { + if (for_ra) + valid_sum_count += le16_to_cpu( + F2FS_CKPT(sbi)->cur_data_blkoff[i]); + else + valid_sum_count += curseg_blkoff(sbi, i); + } } sum_in_page = (PAGE_CACHE_SIZE - 2 * SUM_JOURNAL_SIZE - @@ -1440,12 +1445,22 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi) int err; if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { + int npages = npages_for_summary_flush(sbi, true); + + if (npages >= 2) + ra_meta_pages(sbi, start_sum_block(sbi), npages, + META_CP); + /* restore for compacted data summary */ if (read_compacted_summaries(sbi)) return -EINVAL; type = CURSEG_HOT_NODE; } + if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) + ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type), + NR_CURSEG_TYPE - type, META_CP); + for (; type <= CURSEG_COLD_NODE; type++) { err = read_normal_summaries(sbi, type); if (err) |