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| author |  Daeho Jeong <daehojeong@google.com>
| 2022-06-20 10:38:42 -0700 |
|---|---|---|
| committer |  Jaegeuk Kim <jaegeuk@kernel.org>
| 2022-07-30 20:16:12 -0700 |
| commit | 7a8fc586180d8c57db5cc1e2acb32bb9986f642b (patch) | |
| tree | a0728db61b8890aaf8a78474547c19c741b617fd /fs/f2fs/super.c | |
| parent | f2fs: initialize page_array_entry slab only if compression feature is on (diff) | |
| download | linux-7a8fc586180d8c57db5cc1e2acb32bb9986f642b.tar.gz linux-7a8fc586180d8c57db5cc1e2acb32bb9986f642b.tar.bz2 linux-7a8fc586180d8c57db5cc1e2acb32bb9986f642b.zip | |
f2fs: introduce memory mode
Introduce memory mode to supports "normal" and "low" memory modes.
"low" mode is to support low memory devices. Because of the nature of
low memory devices, in this mode, f2fs will try to save memory sometimes
by sacrificing performance. "normal" mode is the default mode and same
as before.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 3112fe92f934..cf9cf24f9b56 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -160,6 +160,7 @@ enum { Opt_gc_merge, Opt_nogc_merge, Opt_discard_unit, + Opt_memory_mode, Opt_err, }; @@ -236,6 +237,7 @@ static match_table_t f2fs_tokens = { {Opt_gc_merge, "gc_merge"}, {Opt_nogc_merge, "nogc_merge"}, {Opt_discard_unit, "discard_unit=%s"}, + {Opt_memory_mode, "memory=%s"}, {Opt_err, NULL}, }; @@ -1235,6 +1237,22 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) } kfree(name); break; + case Opt_memory_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "normal")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_NORMAL; + } else if (!strcmp(name, "low")) { + F2FS_OPTION(sbi).memory_mode = + MEMORY_MODE_LOW; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; default: f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value", p); @@ -2006,6 +2024,11 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION) seq_printf(seq, ",discard_unit=%s", "section"); + if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL) + seq_printf(seq, ",memory=%s", "normal"); + else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW) + seq_printf(seq, ",memory=%s", "low"); + return 0; } @@ -2027,6 +2050,7 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_ext_cnt = 0; F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; + F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL; sbi->sb->s_flags &= ~SB_INLINECRYPT; |