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-rw-r--r--Documentation/filesystems/btrfs.txt1
-rw-r--r--fs/btrfs/super.c8
2 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt
index 13a7cac80430..303b49c6c296 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.txt
@@ -117,6 +117,7 @@ Options with (*) are default options and will not show in the mount options.
117 "bug" - BUG() on a fatal error. This is the default. 117 "bug" - BUG() on a fatal error. This is the default.
118 "panic" - panic() on a fatal error. 118 "panic" - panic() on a fatal error.
119 119
120 noflushoncommit(*)
120 flushoncommit 121 flushoncommit
121 The 'flushoncommit' mount option forces any data dirtied by a write in a 122 The 'flushoncommit' mount option forces any data dirtied by a write in a
122 prior transaction to commit as part of the current commit. This makes 123 prior transaction to commit as part of the current commit. This makes
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 832540645c20..98a682340935 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -324,7 +324,7 @@ enum {
324 Opt_check_integrity, Opt_check_integrity_including_extent_data, 324 Opt_check_integrity, Opt_check_integrity_including_extent_data,
325 Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, 325 Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
326 Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard, 326 Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
327 Opt_noenospc_debug, 327 Opt_noenospc_debug, Opt_noflushoncommit,
328 Opt_err, 328 Opt_err,
329}; 329};
330 330
@@ -350,6 +350,7 @@ static match_table_t tokens = {
350 {Opt_noacl, "noacl"}, 350 {Opt_noacl, "noacl"},
351 {Opt_notreelog, "notreelog"}, 351 {Opt_notreelog, "notreelog"},
352 {Opt_flushoncommit, "flushoncommit"}, 352 {Opt_flushoncommit, "flushoncommit"},
353 {Opt_noflushoncommit, "noflushoncommit"},
353 {Opt_ratio, "metadata_ratio=%d"}, 354 {Opt_ratio, "metadata_ratio=%d"},
354 {Opt_discard, "discard"}, 355 {Opt_discard, "discard"},
355 {Opt_nodiscard, "nodiscard"}, 356 {Opt_nodiscard, "nodiscard"},
@@ -562,6 +563,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
562 btrfs_info(root->fs_info, "turning on flush-on-commit"); 563 btrfs_info(root->fs_info, "turning on flush-on-commit");
563 btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT); 564 btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT);
564 break; 565 break;
566 case Opt_noflushoncommit:
567 if (btrfs_test_opt(root, FLUSHONCOMMIT))
568 btrfs_info(root->fs_info, "turning off flush-on-commit");
569 btrfs_clear_opt(info->mount_opt, FLUSHONCOMMIT);
570 break;
565 case Opt_ratio: 571 case Opt_ratio:
566 ret = match_int(&args[0], &intarg); 572 ret = match_int(&args[0], &intarg);
567 if (ret) { 573 if (ret) {