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: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 6c5fc76..512ffd8 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -54,6 +54,7 @@
Opt_inline_dentry,
Opt_flush_merge,
Opt_nobarrier,
+ Opt_fastboot,
Opt_err,
};
@@ -73,6 +74,7 @@
{Opt_inline_dentry, "inline_dentry"},
{Opt_flush_merge, "flush_merge"},
{Opt_nobarrier, "nobarrier"},
+ {Opt_fastboot, "fastboot"},
{Opt_err, NULL},
};
@@ -351,6 +353,9 @@
case Opt_nobarrier:
set_opt(sbi, NOBARRIER);
break;
+ case Opt_fastboot:
+ set_opt(sbi, FASTBOOT);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
@@ -479,9 +484,9 @@
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;
mutex_lock(&sbi->gc_mutex);
write_checkpoint(sbi, &cpc);
mutex_unlock(&sbi->gc_mutex);
@@ -574,6 +579,8 @@
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;