panic: assertwaitok: non-zero mutex count: 1 Starting stack trace... panic(ffffffff82ff64fa) 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(ffffffff835c1e50,1) at pool_get+0x1e9 sys/kern/subr_pool.c:589 uvm_mapent_alloc(fffffd806c219c28,0) at uvm_mapent_alloc+0x35a uvm_map_protect(fffffd806c219c28,20000000,20800000,5,0,0,9d7b839934dd7ac1) at uvm_map_protect+0x888 sys/uvm/uvm_map.c:3138 sys_mprotect(ffff80002a4c27d0,ffff80002f211160,ffff80002f2110b0) at sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 syscall(ffff80002f211160) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdb0671f81f0, count: 247 End of stack trace.