Btrfs: Only prep for btree deletion balances when nodes are mostly empty

[karo-tx-linux.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 7feac5a475e970bac2fe10c5d313dbefcfb4ae69..5aebddd711934817e6f2993375bc1031e3330e63 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -799,7 +799,7 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
        ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
 
        if (ret == 0)
-               buf->flags |= EXTENT_UPTODATE;
+               set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags);
        else
                WARN_ON(1);
        return buf;
@@ -813,6 +813,10 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
        if (btrfs_header_generation(buf) ==
            root->fs_info->running_transaction->transid) {
                WARN_ON(!btrfs_tree_locked(buf));
+
+               /* ugh, clear_extent_buffer_dirty can be expensive */
+               btrfs_set_lock_blocking(buf);
+
                clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree,
                                          buf);
        }
@@ -1503,7 +1507,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
        INIT_LIST_HEAD(&fs_info->dead_roots);
        INIT_LIST_HEAD(&fs_info->hashers);
        INIT_LIST_HEAD(&fs_info->delalloc_inodes);
-       spin_lock_init(&fs_info->hash_lock);
        spin_lock_init(&fs_info->delalloc_lock);
        spin_lock_init(&fs_info->new_trans_lock);
        spin_lock_init(&fs_info->ref_cache_lock);
@@ -1679,6 +1682,8 @@ struct btrfs_root *open_ctree(struct super_block *sb,
         * low idle thresh
         */
        fs_info->endio_workers.idle_thresh = 4;
+       fs_info->endio_meta_workers.idle_thresh = 4;
+
        fs_info->endio_write_workers.idle_thresh = 64;
        fs_info->endio_meta_write_workers.idle_thresh = 64;
 
@@ -2310,6 +2315,8 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
        u64 transid = btrfs_header_generation(buf);
        struct inode *btree_inode = root->fs_info->btree_inode;
 
+       btrfs_set_lock_blocking(buf);
+
        WARN_ON(!btrfs_tree_locked(buf));
        if (transid != root->fs_info->generation) {
                printk(KERN_CRIT "btrfs transid mismatch buffer %llu, "
@@ -2352,14 +2359,13 @@ int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
        int ret;
        ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
        if (ret == 0)
-               buf->flags |= EXTENT_UPTODATE;
+               set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags);
        return ret;
 }
 
 int btree_lock_page_hook(struct page *page)
 {
        struct inode *inode = page->mapping->host;
-       struct btrfs_root *root = BTRFS_I(inode)->root;
        struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
        struct extent_buffer *eb;
        unsigned long len;
@@ -2374,9 +2380,7 @@ int btree_lock_page_hook(struct page *page)
                goto out;
 
        btrfs_tree_lock(eb);
-       spin_lock(&root->fs_info->hash_lock);
        btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
-       spin_unlock(&root->fs_info->hash_lock);
        btrfs_tree_unlock(eb);
        free_extent_buffer(eb);
 out: