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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-10 16:53:02 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-16 04:10:44 -0700 |
| commit | c1ce1b02bb25640567dc484dc94d3a195d21e705 (patch) | |
| tree | 66d98ac24b6959a78618b1706f156f8f76614ad8 /fs/f2fs/segment.c | |
| parent | a7ffdbe22cecaed59b5d76a5f003d68907d64240 (diff) | |
| download | blackbird-op-linux-c1ce1b02bb25640567dc484dc94d3a195d21e705.tar.gz blackbird-op-linux-c1ce1b02bb25640567dc484dc94d3a195d21e705.zip | |
f2fs: give an option to enable in-place-updates during fsync to users
If user wrote F2FS_IPU_FSYNC:4 in /sys/fs/f2fs/ipu_policy, f2fs_sync_file
only starts to try in-place-updates.
And, if the number of dirty pages is over /sys/fs/f2fs/min_fsync_blocks, it
keeps out-of-order manner. Otherwise, it triggers in-place-updates.
This may be used by storage showing very high random write performance.
For example, it can be used when,
Seq. writes (Data) + wait + Seq. writes (Node)
is pretty much slower than,
Rand. writes (Data)
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index e158d6358474..c6f627b492cd 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1928,8 +1928,9 @@ int build_segment_manager(struct f2fs_sb_info *sbi) sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); sm_info->rec_prefree_segments = sm_info->main_segments * DEF_RECLAIM_PREFREE_SEGMENTS / 100; - sm_info->ipu_policy = F2FS_IPU_DISABLE; + sm_info->ipu_policy = F2FS_IPU_FSYNC; sm_info->min_ipu_util = DEF_MIN_IPU_UTIL; + sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS; INIT_LIST_HEAD(&sm_info->discard_list); sm_info->nr_discards = 0; |
