ext4: Enable delalloc by default.

[linux-2.6-omap-h63xx.git] / fs / ext4 / super.c

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 629d0fa27e3a1a0c20f56f564c3734c35d2ee9b4..4e104dd0ec212124b42da43c5ae08ebe62f663f7 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -574,6 +574,11 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
        INIT_LIST_HEAD(&ei->i_prealloc_list);
        spin_lock_init(&ei->i_prealloc_lock);
        jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode);
+       ei->i_reserved_data_blocks = 0;
+       ei->i_reserved_meta_blocks = 0;
+       ei->i_allocated_meta_blocks = 0;
+       ei->i_delalloc_reserved_flag = 0;
+       spin_lock_init(&(ei->i_block_reservation_lock));
        return &ei->vfs_inode;
 }
 
@@ -751,6 +756,9 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
                seq_puts(seq, ",nomballoc");
        if (test_opt(sb, I_VERSION))
                seq_puts(seq, ",i_version");
+       if (!test_opt(sb, DELALLOC))
+               seq_puts(seq, ",nodelalloc");
+
 
        if (sbi->s_stripe)
                seq_printf(seq, ",stripe=%lu", sbi->s_stripe);
@@ -898,7 +906,7 @@ enum {
        Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
        Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
        Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
-       Opt_mballoc, Opt_nomballoc, Opt_stripe,
+       Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_delalloc, Opt_nodelalloc,
 };
 
 static match_table_t tokens = {
@@ -957,6 +965,8 @@ static match_table_t tokens = {
        {Opt_nomballoc, "nomballoc"},
        {Opt_stripe, "stripe=%u"},
        {Opt_resize, "resize"},
+       {Opt_delalloc, "delalloc"},
+       {Opt_nodelalloc, "nodelalloc"},
        {Opt_err, NULL},
 };
 
@@ -1322,6 +1332,9 @@ set_qf_format:
                        set_opt(sbi->s_mount_opt, I_VERSION);
                        sb->s_flags |= MS_I_VERSION;
                        break;
+               case Opt_nodelalloc:
+                       clear_opt(sbi->s_mount_opt, DELALLOC);
+                       break;
                case Opt_mballoc:
                        set_opt(sbi->s_mount_opt, MBALLOC);
                        break;
@@ -1335,6 +1348,9 @@ set_qf_format:
                                return 0;
                        sbi->s_stripe = option;
                        break;
+               case Opt_delalloc:
+                       set_opt(sbi->s_mount_opt, DELALLOC);
+                       break;
                default:
                        printk (KERN_ERR
                                "EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1975,6 +1991,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
         */
        set_opt(sbi->s_mount_opt, MBALLOC);
 
+       /*
+        * enable delayed allocation by default
+        * Use -o nodelalloc to turn it off
+        */
+       set_opt(sbi->s_mount_opt, DELALLOC);
+
+
        if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
                            NULL, 0))
                goto failed_mount;
@@ -2413,6 +2436,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered":
                "writeback");
 
+       if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
+               printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - "
+                               "requested data journaling mode\n");
+               clear_opt(sbi->s_mount_opt, DELALLOC);
+       } else if (test_opt(sb, DELALLOC))
+               printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n");
+
        ext4_ext_init(sb);
        ext4_mb_init(sb, needs_recovery);