[Bug 203521] MongoDB hangs during mi_switch

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203521

--- Comment #1 from Randy Westlund <rwestlun at gmail.com> ---
I'm seeing the same thing with vim in a separate jail.  This jail launches
okay, but vim won't start.

root at jakory:~ # procstat -kk 37514
  PID    TID COMM             TDNAME           KSTACK
37514 101411 vim              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d umtxq_sleep+0x125
do_lock_umutex+0x1f74 __umtx_op_wait_umutex+0x78 amd64_syscall+0x357
Xfast_syscall+0xfb

root at jakory:~ # procstat -r 37514
  PID COMM             RESOURCE                          VALUE
37514 vim              user time                    00:00:00.032873
37514 vim              system time                  00:00:00.064690
37514 vim              maximum RSS                            12132 KB
37514 vim              integral shared memory                 23760 KB
37514 vim              integral unshared data                  1260 KB
37514 vim              integral unshared stack                 1152 KB
37514 vim              page reclaims                            437
37514 vim              page faults                              285
37514 vim              swaps                                      0
37514 vim              block reads                              184
37514 vim              block writes                               0
37514 vim              messages sent                              0
37514 vim              messages received                          0
37514 vim              signals received                           0
37514 vim              voluntary context switches               244
37514 vim              involuntary context switches              15


root at jakory:~ # procstat -t 37514
  PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
37514 101411 vim              -                  0  126 sleep   umtxn



This is clearly not specific to MongoDB.

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