From: Chris Mason <chris.mason@oracle.com>
Date: Tue, 18 Dec 2007 01:14:04 +0000 (-0500)
Subject: Btrfs: Fix extent_map and extent_state leaks by flushing lrus on FS unmount
X-Git-Tag: firefly_0821_release~15789^2~11^2~55^2~56^2~30^2~375
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d10c5f31c79c6a703974ae29d0a05781b828fe30;p=firefly-linux-kernel-4.4.55.git

Btrfs: Fix extent_map and extent_state leaks by flushing lrus on FS unmount

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4338b00c2a25..278564178993 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -765,8 +765,18 @@ int close_ctree(struct btrfs_root *root)
 
 	btrfs_free_block_groups(root->fs_info);
 	del_fs_roots(fs_info);
+
+	filemap_write_and_wait(fs_info->btree_inode->i_mapping);
+
+	extent_map_tree_empty_lru(&fs_info->free_space_cache);
+	extent_map_tree_empty_lru(&fs_info->block_group_cache);
+	extent_map_tree_empty_lru(&fs_info->pinned_extents);
+	extent_map_tree_empty_lru(&fs_info->pending_del);
+	extent_map_tree_empty_lru(&fs_info->extent_ins);
 	extent_map_tree_empty_lru(&BTRFS_I(fs_info->btree_inode)->extent_tree);
+
 	truncate_inode_pages(fs_info->btree_inode->i_mapping, 0);
+
 	iput(fs_info->btree_inode);
 #if 0
 	while(!list_empty(&fs_info->hashers)) {