panic: assertwaitok: non-zero mutex count: 1
Starting stack trace...
panic(ffffffff8300092d) at panic+0x1ba sys/kern/subr_prf.c:229
assertwaitok() at assertwaitok+0x16f sys/kern/subr_xxx.c:163
mi_switch() at mi_switch+0x2b6 sys/kern/sched_bsd.c:412
yield() at yield+0x61 sys/kern/sched_bsd.c:320
pool_get(ffffffff8359ec78,1) at pool_get+0x1e9 sys/kern/subr_pool.c:589
pmap_create() at pmap_create+0x18c sys/arch/amd64/amd64/pmap.c:1391
uvmspace_fork(ffff8000ffffb7b8) at uvmspace_fork+0x7f uvmspace_alloc sys/uvm/uvm_map.c:3240 [inline]
uvmspace_fork(ffff8000ffffb7b8) at uvmspace_fork+0x7f sys/uvm/uvm_map.c:3811
process_new(ffff800037610f68,ffff8000ffffb7b8,1) at process_new+0x553 sys/kern/kern_fork.c:279
fork1(ffff80002a4b07a8,1,ffffffff815d99c0,0,ffff80002a57b070,0) at fork1+0x3e6 sys/kern/kern_fork.c:405
syscall(ffff80002a57b120) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x763431dcc040, count: 246
End of stack trace.