f2fs: add nobarrier mount option
This patch adds a mount option, nobarrier, in f2fs.
The assumption in here is that file system keeps the IO ordering, but
doesn't care about cache flushes inside the storages.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 34649aa..93593ce 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -52,6 +52,7 @@
Opt_inline_xattr,
Opt_inline_data,
Opt_flush_merge,
+ Opt_nobarrier,
Opt_err,
};
@@ -69,6 +70,7 @@
{Opt_inline_xattr, "inline_xattr"},
{Opt_inline_data, "inline_data"},
{Opt_flush_merge, "flush_merge"},
+ {Opt_nobarrier, "nobarrier"},
{Opt_err, NULL},
};
@@ -339,6 +341,9 @@
case Opt_flush_merge:
set_opt(sbi, FLUSH_MERGE);
break;
+ case Opt_nobarrier:
+ set_opt(sbi, NOBARRIER);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
@@ -544,6 +549,8 @@
seq_puts(seq, ",inline_data");
if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
seq_puts(seq, ",flush_merge");
+ if (test_opt(sbi, NOBARRIER))
+ seq_puts(seq, ",nobarrier");
seq_printf(seq, ",active_logs=%u", sbi->active_logs);
return 0;