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>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index d5f987b49d70..287a6728b1ad 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -326,6 +326,8 @@ again:
         }
 
         if (num_bytes) {
+                trace_btrfs_space_reservation(root->fs_info, "transaction",
+                                              (u64)h, num_bytes, 1);
                 h->block_rsv = &root->fs_info->trans_block_rsv;
                 h->bytes_reserved = num_bytes;
         }