6d836e6f8b
Adds a module option which disables the hole_birth optimization which has been responsible for several recent bugs, including issue #4050. Original-patch: https://gist.github.com/pcd1193182/2c0cd47211f3aee623958b4698836c48 Signed-off-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #4833