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authorJosef Bacik <josef@redhat.com>2012-01-10 10:31:31 -0500
committerChris Mason <chris.mason@oracle.com>2012-01-16 15:29:43 -0500
commit8c2a3ca20f6233677ac3222c6506174010eb414f (patch)
tree88d1105c665d355b363929557ed0c5489795e348 /fs/btrfs/delayed-inode.c
parent90290e19820e3323ce6b9c2888eeb68bf29c278b (diff)
Btrfs: space leak tracepoints
This in addition to a script in my btrfs-tracing tree will help track down space leaks when we're getting space left over in block groups on umount. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/delayed-inode.c')
-rw-r--r--fs/btrfs/delayed-inode.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 9c1eccc2c503..fe4cd0f1cef1 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -595,8 +595,12 @@ static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans,
num_bytes = btrfs_calc_trans_metadata_size(root, 1);
ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
- if (!ret)
+ if (!ret) {
+ trace_btrfs_space_reservation(root->fs_info, "delayed_item",
+ item->key.objectid,
+ num_bytes, 1);
item->bytes_reserved = num_bytes;
+ }
return ret;
}
@@ -610,6 +614,9 @@ static void btrfs_delayed_item_release_metadata(struct btrfs_root *root,
return;
rsv = &root->fs_info->delayed_block_rsv;
+ trace_btrfs_space_reservation(root->fs_info, "delayed_item",
+ item->key.objectid, item->bytes_reserved,
+ 0);
btrfs_block_rsv_release(root, rsv,
item->bytes_reserved);
}
@@ -624,7 +631,7 @@ static int btrfs_delayed_inode_reserve_metadata(
struct btrfs_block_rsv *dst_rsv;
u64 num_bytes;
int ret;
- int release = false;
+ bool release = false;
src_rsv = trans->block_rsv;
dst_rsv = &root->fs_info->delayed_block_rsv;
@@ -651,8 +658,13 @@ static int btrfs_delayed_inode_reserve_metadata(
*/
if (ret == -EAGAIN)
ret = -ENOSPC;
- if (!ret)
+ if (!ret) {
node->bytes_reserved = num_bytes;
+ trace_btrfs_space_reservation(root->fs_info,
+ "delayed_inode",
+ btrfs_ino(inode),
+ num_bytes, 1);
+ }
return ret;
} else if (src_rsv == &root->fs_info->delalloc_block_rsv) {
spin_lock(&BTRFS_I(inode)->lock);
@@ -707,11 +719,17 @@ out:
* reservation here. I think it may be time for a documentation page on
* how block rsvs. work.
*/
- if (!ret)
+ if (!ret) {
+ trace_btrfs_space_reservation(root->fs_info, "delayed_inode",
+ btrfs_ino(inode), num_bytes, 1);
node->bytes_reserved = num_bytes;
+ }
- if (release)
+ if (release) {
+ trace_btrfs_space_reservation(root->fs_info, "delalloc",
+ btrfs_ino(inode), num_bytes, 0);
btrfs_block_rsv_release(root, src_rsv, num_bytes);
+ }
return ret;
}
@@ -725,6 +743,8 @@ static void btrfs_delayed_inode_release_metadata(struct btrfs_root *root,
return;
rsv = &root->fs_info->delayed_block_rsv;
+ trace_btrfs_space_reservation(root->fs_info, "delayed_inode",
+ node->inode_id, node->bytes_reserved, 0);
btrfs_block_rsv_release(root, rsv,
node->bytes_reserved);
node->bytes_reserved = 0;
@@ -1372,13 +1392,6 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
goto release_node;
}
- ret = btrfs_delayed_item_reserve_metadata(trans, root, delayed_item);
- /*
- * we have reserved enough space when we start a new transaction,
- * so reserving metadata failure is impossible
- */
- BUG_ON(ret);
-
delayed_item->key.objectid = btrfs_ino(dir);
btrfs_set_key_type(&delayed_item->key, BTRFS_DIR_INDEX_KEY);
delayed_item->key.offset = index;
@@ -1391,6 +1404,14 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
dir_item->type = type;
memcpy((char *)(dir_item + 1), name, name_len);
+ ret = btrfs_delayed_item_reserve_metadata(trans, root, delayed_item);
+ /*
+ * we have reserved enough space when we start a new transaction,
+ * so reserving metadata failure is impossible
+ */
+ BUG_ON(ret);
+
+
mutex_lock(&delayed_node->mutex);
ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item);
if (unlikely(ret)) {