diff options
| author | Chao Yu <yuchao0@huawei.com> | 2017-04-28 13:56:08 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-05-03 10:04:56 -0700 |
| commit | 1f43e2ad7bff54f7c82a084a57e5c90da0d3f4d9 (patch) | |
| tree | e10bc36ec318ab4c4b8d9b5c9aad579d9f516b4f /fs/f2fs | |
| parent | c473f1a9658b6c23d576136d5a49b1c731ef1767 (diff) | |
f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard
Introduce CP_TRIMMED_FLAG to indicate all invalid block were trimmed
before umount, so once we do mount with image which contain the flag,
we don't record invalid blocks as undiscard one, when fstrim is being
triggered, we can avoid issuing redundant discard commands.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 3 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 28 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 7 |
4 files changed, 31 insertions, 8 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 27578903eeb6..ea9c317b5916 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -1059,6 +1059,9 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc) sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) disable_nat_bits(sbi, false); + if (cpc->reason & CP_TRIMMED) + __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG); + if (cpc->reason & CP_UMOUNT) __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG); else diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 37360b9ad263..f0481fb52142 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -130,6 +130,7 @@ enum { #define CP_SYNC 0x00000004 #define CP_RECOVERY 0x00000008 #define CP_DISCARD 0x00000010 +#define CP_TRIMMED 0x00000020 #define DEF_BATCHED_TRIM_SECTIONS 2048 #define BATCHED_TRIM_SEGMENTS(sbi) \ diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 69b99a8f9a01..a32268eeb472 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -3005,10 +3005,17 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) /* build discard map only one time */ if (f2fs_discard_en(sbi)) { - memcpy(se->discard_map, se->cur_valid_map, - SIT_VBLOCK_MAP_SIZE); - sbi->discard_blks += sbi->blocks_per_seg - - se->valid_blocks; + if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { + memset(se->discard_map, 0xff, + SIT_VBLOCK_MAP_SIZE); + } else { + memcpy(se->discard_map, + se->cur_valid_map, + SIT_VBLOCK_MAP_SIZE); + sbi->discard_blks += + sbi->blocks_per_seg - + se->valid_blocks; + } } if (sbi->segs_per_sec > 1) @@ -3032,10 +3039,15 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) seg_info_from_raw_sit(se, &sit); if (f2fs_discard_en(sbi)) { - memcpy(se->discard_map, se->cur_valid_map, - SIT_VBLOCK_MAP_SIZE); - sbi->discard_blks += old_valid_blocks - - se->valid_blocks; + if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { + memset(se->discard_map, 0xff, + SIT_VBLOCK_MAP_SIZE); + } else { + memcpy(se->discard_map, se->cur_valid_map, + SIT_VBLOCK_MAP_SIZE); + sbi->discard_blks += old_valid_blocks - + se->valid_blocks; + } } if (sbi->segs_per_sec > 1) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 4cd3bee6775f..9a14b2590337 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -797,6 +797,13 @@ static void f2fs_put_super(struct super_block *sb) /* be sure to wait for any on-going discard commands */ f2fs_wait_discard_bios(sbi); + if (!sbi->discard_blks) { + struct cp_control cpc = { + .reason = CP_UMOUNT | CP_TRIMMED, + }; + write_checkpoint(sbi, &cpc); + } + /* write_checkpoint can update stat informaion */ f2fs_destroy_stats(sbi); |