btrfs: Add noflushoncommit mount option.
Add noflushoncommit mount option to disable flush on commit with
remount option.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8325406..98a6823 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -324,7 +324,7 @@
Opt_check_integrity, Opt_check_integrity_including_extent_data,
Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
- Opt_noenospc_debug,
+ Opt_noenospc_debug, Opt_noflushoncommit,
Opt_err,
};
@@ -350,6 +350,7 @@
{Opt_noacl, "noacl"},
{Opt_notreelog, "notreelog"},
{Opt_flushoncommit, "flushoncommit"},
+ {Opt_noflushoncommit, "noflushoncommit"},
{Opt_ratio, "metadata_ratio=%d"},
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
@@ -562,6 +563,11 @@
btrfs_info(root->fs_info, "turning on flush-on-commit");
btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT);
break;
+ case Opt_noflushoncommit:
+ if (btrfs_test_opt(root, FLUSHONCOMMIT))
+ btrfs_info(root->fs_info, "turning off flush-on-commit");
+ btrfs_clear_opt(info->mount_opt, FLUSHONCOMMIT);
+ break;
case Opt_ratio:
ret = match_int(&args[0], &intarg);
if (ret) {