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Btrfs: Run igrab on data=ordered inodes to prevent deadlocks during writeout

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-01-16 11:44:43 -05:00
parent 9cce6c3bfc
commit 2da98f003f
5 changed files with 37 additions and 10 deletions
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10
fs/btrfs/ordered-data.c
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@@ -153,6 +153,8 @@ int btrfs_add_ordered_inode(struct inode *inode)
write_unlock(&tree->lock);
if (node)
kfree(entry);
else
igrab(inode);
return 0;
}
@@ -221,6 +223,7 @@ int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
}
static int __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
struct inode *inode,
u64 root_objectid, u64 objectid)
{
struct tree_entry *entry;
@@ -234,6 +237,7 @@ static int __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
return 0;
}
rb_erase(node, &tree->tree);
BTRFS_I(inode)->ordered_trans = 0;
write_unlock(&tree->lock);
entry = rb_entry(node, struct tree_entry, rb_node);
kfree(entry);
@@ -244,14 +248,16 @@ int btrfs_del_ordered_inode(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 root_objectid = root->root_key.objectid;
int ret = 0;
spin_lock(&root->fs_info->new_trans_lock);
if (root->fs_info->running_transaction) {
struct btrfs_ordered_inode_tree *tree;
tree = &root->fs_info->running_transaction->ordered_inode_tree;
__btrfs_del_ordered_inode(tree, root_objectid, inode->i_ino);
ret = __btrfs_del_ordered_inode(tree, inode, root_objectid,
inode->i_ino);
}
spin_unlock(&root->fs_info->new_trans_lock);
return 0;
return ret;
}