Commit d5053a34 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: introduce -o fastboot for reducing booting time only

If a system wants to reduce the booting time as a top priority, now we can
use a mount option, -o fastboot.
With this option, f2fs conducts a little bit slow write_checkpoint, but
it can avoid the node page reads during the next mount time.

Signed-off-by: default avatarJaegeuk Kim <>
parent be138b7b
......@@ -135,6 +135,9 @@ nobarrier This option can be used if underlying storage guarantees
If this option is set, no cache_flush commands are issued
but f2fs still guarantees the write ordering of all the
data writes.
fastboot This option is used when a system wants to reduce mount
time as much as possible, even though normal performance
can be sacrificed.
......@@ -49,6 +49,7 @@
#define F2FS_MOUNT_INLINE_DENTRY 0x00000200
#define F2FS_MOUNT_FLUSH_MERGE 0x00000400
#define F2FS_MOUNT_NOBARRIER 0x00000800
#define F2FS_MOUNT_FASTBOOT 0x00001000
#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
......@@ -130,6 +130,8 @@ static inline bool need_do_checkpoint(struct inode *inode)
need_cp = true;
else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
need_cp = true;
else if (test_opt(sbi, FASTBOOT))
need_cp = true;
return need_cp;
......@@ -695,9 +695,9 @@ int f2fs_gc(struct f2fs_sb_info *sbi)
int gc_type = BG_GC;
int nfree = 0;
int ret = -1;
struct cp_control cpc = {
.reason = CP_SYNC,
struct cp_control cpc;
cpc.reason = test_opt(sbi, FASTBOOT) ? CP_UMOUNT : CP_SYNC;
......@@ -54,6 +54,7 @@ enum {
......@@ -73,6 +74,7 @@ static match_table_t f2fs_tokens = {
{Opt_inline_dentry, "inline_dentry"},
{Opt_flush_merge, "flush_merge"},
{Opt_nobarrier, "nobarrier"},
{Opt_fastboot, "fastboot"},
{Opt_err, NULL},
......@@ -351,6 +353,9 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_nobarrier:
set_opt(sbi, NOBARRIER);
case Opt_fastboot:
set_opt(sbi, FASTBOOT);
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
......@@ -479,9 +484,9 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
trace_f2fs_sync_fs(sb, sync);
if (sync) {
struct cp_control cpc = {
.reason = CP_SYNC,
struct cp_control cpc;
cpc.reason = test_opt(sbi, FASTBOOT) ? CP_UMOUNT : CP_SYNC;
write_checkpoint(sbi, &cpc);
......@@ -574,6 +579,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",flush_merge");
if (test_opt(sbi, NOBARRIER))
seq_puts(seq, ",nobarrier");
if (test_opt(sbi, FASTBOOT))
seq_puts(seq, ",fastboot");
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
return 0;
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