fence_wait returned with error -512?

Any idea what this means? Jun 9 19:57:43 haymarket kernel: fence_wait returned with error -512 Jun 9 19:59:52 haymarket kernel: fence_wait returned with error -512 Jun 9 20:00:40 haymarket kernel: fence_wait returned with error -512 Jun 9 20:11:30 haymarket last message repeated 19 times Jun

Problem reports for sta...@freebsd.org that need special attention

To view an individual PR, use: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=(Bug Id). The following is a listing of current problems submitted by FreeBSD users, which need special attention. These represent problem reports covering all versions including experimental development code and ob