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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-09-20 03:55:10 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-09-30 20:05:46 +0300 |
| commit | a468f0ef516fda9c7d91bb550d458e853d76955e (patch) | |
| tree | 87906aa2c4e349c0b04e8276de05cf956887e150 /fs/f2fs/f2fs.h | |
| parent | 5d4c0af41fd4cc26cb75af4f3de7fb63c91209c1 (diff) | |
| download | linux-a468f0ef516fda9c7d91bb550d458e853d76955e.tar.xz | |
f2fs: use crc and cp version to determine roll-forward recovery
Previously, we used cp_version only to detect recoverable dnodes.
In order to avoid same garbage cp_version, we needed to truncate the next
dnode during checkpoint, resulting in additional discard or data write.
If we can distinguish this by using crc in addition to cp_version, we can
remove this overhead.
There is backward compatibility concern where it changes node_footer layout.
So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to
detect new layout. New layout will be activated only when this flag is set.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index b39fdcdcf891..cda8e6f96618 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2045,7 +2045,6 @@ void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); void f2fs_wait_all_discard_bio(struct f2fs_sb_info *); void clear_prefree_segments(struct f2fs_sb_info *, struct cp_control *); void release_discard_addrs(struct f2fs_sb_info *); -bool discard_next_dnode(struct f2fs_sb_info *, block_t); int npages_for_summary_flush(struct f2fs_sb_info *, bool); void allocate_new_segments(struct f2fs_sb_info *); int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *); |