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| author | Chao Yu <yuchao0@huawei.com> | 2020-08-04 16:14:45 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-09-11 00:03:30 +0300 |
| commit | d0b9e42ab6155dc05fc83f00af9f45d4dd02264d (patch) | |
| tree | dd8440fcfc93b9cf49c36ea52b4822d57ba9b613 /fs/f2fs/super.c | |
| parent | 376207af4bf809a48bea79fc1970a17e048c734e (diff) | |
| download | linux-d0b9e42ab6155dc05fc83f00af9f45d4dd02264d.tar.xz | |
f2fs: introduce inmem curseg
Previous implementation of aligned pinfile allocation will:
- allocate new segment on cold data log no matter whether last used
segment is partially used or not, it makes IOs more random;
- force concurrent cold data/GCed IO going into warm data area, it
can make a bad effect on hot/cold data separation;
In this patch, we introduce a new type of log named 'inmem curseg',
the differents from normal curseg is:
- it reuses existed segment type (CURSEG_XXX_NODE/DATA);
- it only exists in memory, its segno, blkofs, summary will not b
persisted into checkpoint area;
With this new feature, we can enhance scalability of log, special
allocators can be created for purposes:
- pure lfs allocator for aligned pinfile allocation or file
defragmentation
- pure ssr allocator for later feature
So that, let's update aligned pinfile allocation to use this new
inmem curseg fwk.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 970257ee5d65..17e4008141e6 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -580,7 +580,8 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) case Opt_active_logs: if (args->from && match_int(args, &arg)) return -EINVAL; - if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) + if (arg != 2 && arg != 4 && + arg != NR_CURSEG_PERSIST_TYPE) return -EINVAL; F2FS_OPTION(sbi).active_logs = arg; break; @@ -1001,7 +1002,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) } /* Not pass down write hints if the number of active logs is lesser - * than NR_CURSEG_TYPE. + * than NR_CURSEG_PERSIST_TYPE. */ if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE) F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF; @@ -1641,7 +1642,7 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) static void default_options(struct f2fs_sb_info *sbi) { /* init some FS parameters */ - F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE; + F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE; F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS; F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF; F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT; @@ -2996,7 +2997,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) cp_payload = __cp_payload(sbi); if (cp_pack_start_sum < cp_payload + 1 || cp_pack_start_sum > blocks_per_seg - 1 - - NR_CURSEG_TYPE) { + NR_CURSEG_PERSIST_TYPE) { f2fs_err(sbi, "Wrong cp_pack_start_sum: %u", cp_pack_start_sum); return 1; |