5.3.1 btrfs: Send operation causes soft lockup on large deduped file

Using btrfs send on a large deduped file results in a soft lockup or out-of-memory issue. This problem occurs because the btrfs send operation cannot handle a large deduped file containing file extents that all point to one extent, as these types of file structures create tremendous pressure for the btrfs send operation.

To prevent this issue from occurring, do not use btrfs send on systems with less than 4 GB of memory. (Bug ID 25306023)