summaryrefslogtreecommitdiff
path: root/fs/btrfs/super.c
diff options
context:
space:
mode:
authorChris Mason <chris.mason@oracle.com>2011-05-24 15:35:30 -0400
committerChris Mason <chris.mason@oracle.com>2011-05-26 17:52:15 -0400
commit4cb5300bc839b8a943eb19c9f27f25470e22d0ca (patch)
treeac0f2fb481c7aa6af08a624d276fa6d580c94c9b /fs/btrfs/super.c
parentd6c0cb379c5198487e4ac124728cbb2346d63b1f (diff)
Btrfs: add mount -o auto_defrag
This will detect small random writes into files and queue the up for an auto defrag process. It isn't well suited to database workloads yet, but works for smaller files such as rpm, sqlite or bdb databases. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index cd0c7cd2c8fb..28e3cb2607ff 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -160,7 +160,7 @@ enum {
Opt_compress_type, Opt_compress_force, Opt_compress_force_type,
Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard,
Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed,
- Opt_enospc_debug, Opt_subvolrootid, Opt_err,
+ Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_err,
};
static match_table_t tokens = {
@@ -191,6 +191,7 @@ static match_table_t tokens = {
{Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},
{Opt_enospc_debug, "enospc_debug"},
{Opt_subvolrootid, "subvolrootid=%d"},
+ {Opt_defrag, "autodefrag"},
{Opt_err, NULL},
};
@@ -369,6 +370,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
case Opt_enospc_debug:
btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG);
break;
+ case Opt_defrag:
+ printk(KERN_INFO "btrfs: enabling auto defrag");
+ btrfs_set_opt(info->mount_opt, AUTO_DEFRAG);
+ break;
case Opt_err:
printk(KERN_INFO "btrfs: unrecognized mount option "
"'%s'\n", p);