Btrfs: add mount -o inode_cache

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 1cb72394498cff80add47a44250d6ae68bee5852..bffa5c4a633b0e44d48370ccca645e9068e0bf3b 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2536,6 +2536,9 @@ int load_free_ino_cache(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
        int ret = 0;
        u64 root_gen = btrfs_root_generation(&root->root_item);
 
+       if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+               return 0;
+
        /*
         * If we're unmounting then just return, since this does a search on the
         * normal root and not the commit root and we could deadlock.
@@ -2575,6 +2578,9 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
        struct inode *inode;
        int ret;
 
+       if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+               return 0;
+
        inode = lookup_free_ino_inode(root, path);
        if (IS_ERR(inode))
                return 0;