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authorChris Mason <chris.mason@oracle.com>2011-06-03 09:36:29 -0400
committerChris Mason <chris.mason@oracle.com>2011-06-04 08:03:47 -0400
commit4b9465cb9e3859186eefa1ca3b990a5849386320 (patch)
tree8fc06452fb75e52f6c1c2e2253c2ff6700e622fd /fs/btrfs/inode-map.c
parente7786c3ae517b2c433edc91714e86be770e9f1ce (diff)
downloadop-kernel-dev-4b9465cb9e3859186eefa1ca3b990a5849386320.zip
op-kernel-dev-4b9465cb9e3859186eefa1ca3b990a5849386320.tar.gz
Btrfs: add mount -o inode_cache
This makes the inode map cache default to off until we fix the overflow problem when the free space crcs don't fit inside a single page. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode-map.c')
-rw-r--r--fs/btrfs/inode-map.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index 2d0d500..cb79b89 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -38,6 +38,9 @@ static int caching_kthread(void *data)
int slot;
int ret;
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return 0;
+
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -141,6 +144,9 @@ static void start_caching(struct btrfs_root *root)
int ret;
u64 objectid;
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return;
+
spin_lock(&root->cache_lock);
if (root->cached != BTRFS_CACHE_NO) {
spin_unlock(&root->cache_lock);
@@ -178,6 +184,9 @@ static void start_caching(struct btrfs_root *root)
int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid)
{
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return btrfs_find_free_objectid(root, objectid);
+
again:
*objectid = btrfs_find_ino_for_alloc(root);
@@ -201,6 +210,10 @@ void btrfs_return_ino(struct btrfs_root *root, u64 objectid)
{
struct btrfs_free_space_ctl *ctl = root->free_ino_ctl;
struct btrfs_free_space_ctl *pinned = root->free_ino_pinned;
+
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return;
+
again:
if (root->cached == BTRFS_CACHE_FINISHED) {
__btrfs_add_free_space(ctl, objectid, 1);
@@ -250,6 +263,9 @@ void btrfs_unpin_free_ino(struct btrfs_root *root)
struct rb_node *n;
u64 count;
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return;
+
while (1) {
n = rb_first(rbroot);
if (!n)
@@ -399,9 +415,13 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
root != root->fs_info->tree_root)
return 0;
+ if (!btrfs_test_opt(root, INODE_MAP_CACHE))
+ return 0;
+
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
+
again:
inode = lookup_free_ino_inode(root, path);
if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
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