@@ -120,6 +120,7 @@ Options with (*) are default options and will not show in the mount options.
"bug" - BUG() on a fatal error. This is the default.
"panic" - panic() on a fatal error.
+ noflushoncommit(*)
flushoncommit
The 'flushoncommit' mount option forces any data dirtied by a write in a
prior transaction to commit as part of the current commit. This makes
@@ -324,7 +324,7 @@ enum {
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_nocheck_integrity,
- Opt_nodiscard, Opt_noenospc_debug,
+ Opt_nodiscard, Opt_noenospc_debug, Opt_noflushoncommit,
Opt_err,
};
@@ -350,6 +350,7 @@ static match_table_t tokens = {
{Opt_noacl, "noacl"},
{Opt_notreelog, "notreelog"},
{Opt_flushoncommit, "flushoncommit"},
+ {Opt_noflushoncommit, "noflushoncommit"},
{Opt_ratio, "metadata_ratio=%d"},
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
@@ -563,6 +564,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
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) {
Add noflushoncommit mount option to disable flush on commit with remount option. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> --- changelog: v2: Add noflushoncommit mount option. --- Documentation/filesystems/btrfs.txt | 1 + fs/btrfs/super.c | 8 +++++++- 2 files changed, 8 insertions(+), 1 deletion(-)