diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-02-22 14:09:30 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-04-08 03:51:04 -0700 |
| commit | 1aa536a624cc246bcafd5ace82abe3b50e47c802 (patch) | |
| tree | 6267bb866dee302d9de53ea908582c26b877fe4e | |
| parent | 0ffdffc8f106628a4c6bc3eed2eb3cf88393d2f3 (diff) | |
f2fs: add auto tuning for small devices
If f2fs is running on top of very small devices, it's worth to avoid abusing
free LBAs. In order to achieve that, this patch introduces some parameter
tuning.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/segment.h | 2 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 14 |
2 files changed, 16 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 5d6d3e72be31..d1524d16b2a0 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -596,6 +596,8 @@ static inline int utilization(struct f2fs_sb_info *sbi) #define DEF_MIN_FSYNC_BLOCKS 8 #define DEF_MIN_HOT_BLOCKS 16 +#define SMALL_VOLUME_SEGMENTS (16 * 512) /* 16GB */ + enum { F2FS_IPU_FORCE, F2FS_IPU_SSR, diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index ff59af55ccd4..28c49fc34e86 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2523,6 +2523,18 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi) return 0; } +static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi) +{ + struct f2fs_sm_info *sm_i = SM_I(sbi); + + /* adjust parameters according to the volume size */ + if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) { + sbi->alloc_mode = ALLOC_MODE_REUSE; + sm_i->dcc_info->discard_granularity = 1; + sm_i->ipu_policy = 1 << F2FS_IPU_FORCE; + } +} + static int f2fs_fill_super(struct super_block *sb, void *data, int silent) { struct f2fs_sb_info *sbi; @@ -2875,6 +2887,8 @@ skip_recovery: f2fs_join_shrinker(sbi); + f2fs_tuning_parameters(sbi); + f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx", cur_cp_version(F2FS_CKPT(sbi))); f2fs_update_time(sbi, CP_TIME); |