freebsd stable - May 2018 - [Bug 227213] FreeBSD 10.4 kernel deadlocks on sysctlmemlock

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227213

--- Comment #23 from Eugene Grosbein <eugen at freebsd.org> ---
The process holding sx lock is hald:

257 Thread 100247 (PID=1343: hald)  sched_switch (td=0xfffff80079fd3000,
    newtd=<value optimized out>, flags=<value optimized out>)
    at /usr/src/sys/kern/sched_ule.c:1956

Hald is installed with ports/sysutils/hal.

Mark, why do you need hald? If it's possible, try running 10.4 with hald
disabled.

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