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authorChao Yu <chao2.yu@samsung.com>2015-02-05 09:55:51 (GMT)
committerJaegeuk Kim <jaegeuk@kernel.org>2015-03-03 17:58:46 (GMT)
commit8967215954a50947fbd9c2996232548bf6dd9062 (patch)
treea8e3a164f9c3372fe476e23b09f5871379c31af0 /fs
parent429511cdf8b3a9b894b914f282a9293df405a449 (diff)
downloadlinux-8967215954a50947fbd9c2996232548bf6dd9062.tar.xz
f2fs: add a mount option for rb-tree extent cache
This patch adds a mount option 'extent_cache' in f2fs. It is try to use a rb-tree based extent cache to cache more mapping information with less memory if this option is set, otherwise we will use the original one extent info cache. Suggested-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/super.c7
2 files changed, 8 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a0af10d..759fbaa 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -50,6 +50,7 @@
#define F2FS_MOUNT_FLUSH_MERGE 0x00000400
#define F2FS_MOUNT_NOBARRIER 0x00000800
#define F2FS_MOUNT_FASTBOOT 0x00001000
+#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 4e9aad4..3ce4d7c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -57,6 +57,7 @@ enum {
Opt_flush_merge,
Opt_nobarrier,
Opt_fastboot,
+ Opt_extent_cache,
Opt_err,
};
@@ -78,6 +79,7 @@ static match_table_t f2fs_tokens = {
{Opt_flush_merge, "flush_merge"},
{Opt_nobarrier, "nobarrier"},
{Opt_fastboot, "fastboot"},
+ {Opt_extent_cache, "extent_cache"},
{Opt_err, NULL},
};
@@ -367,6 +369,9 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_fastboot:
set_opt(sbi, FASTBOOT);
break;
+ case Opt_extent_cache:
+ set_opt(sbi, EXTENT_CACHE);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
@@ -599,6 +604,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",nobarrier");
if (test_opt(sbi, FASTBOOT))
seq_puts(seq, ",fastboot");
+ if (test_opt(sbi, EXTENT_CACHE))
+ seq_puts(seq, ",extent_cache");
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
return 0;