diff options
| -rw-r--r-- | Documentation/filesystems/btrfs.txt | 8 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 8 |
2 files changed, 12 insertions, 4 deletions
diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt index ce487a2a88f8..e87609a4e21c 100644 --- a/Documentation/filesystems/btrfs.txt +++ b/Documentation/filesystems/btrfs.txt @@ -46,10 +46,12 @@ Options with (*) are default options and will not show in the mount options. bytes, optionally with a K, M, or G suffix, case insensitive. Default is 1MB. + noautodefrag(*) autodefrag - Detect small random writes into files and queue them up for the - defrag process. Works best for small files; Not well suited for - large database workloads. + Disable/enable auto defragmentation. + Auto defragmentation detects small random writes into files and queue + them up for the defrag process. Works best for small files; + Not well suited for large database workloads. check_int check_int_data diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index b02d25a64b2e..44513f3fbdc1 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -323,7 +323,7 @@ enum { Opt_no_space_cache, Opt_recovery, Opt_skip_balance, 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_commit_interval, Opt_barrier, Opt_nodefrag, Opt_err, }; @@ -357,6 +357,7 @@ static match_table_t tokens = { {Opt_enospc_debug, "enospc_debug"}, {Opt_subvolrootid, "subvolrootid=%d"}, {Opt_defrag, "autodefrag"}, + {Opt_nodefrag, "noautodefrag"}, {Opt_inode_cache, "inode_cache"}, {Opt_no_space_cache, "nospace_cache"}, {Opt_recovery, "recovery"}, @@ -602,6 +603,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_info(root->fs_info, "enabling auto defrag"); btrfs_set_opt(info->mount_opt, AUTO_DEFRAG); break; + case Opt_nodefrag: + if (btrfs_test_opt(root, AUTO_DEFRAG)) + btrfs_info(root->fs_info, "disabling auto defrag"); + btrfs_clear_opt(info->mount_opt, AUTO_DEFRAG); + break; case Opt_recovery: btrfs_info(root->fs_info, "enabling auto recovery"); btrfs_set_opt(info->mount_opt, RECOVERY); |