print("runtime: program exceeds ", sched.maxmcount, "-thread limit\n")
		throw("thread exhaustion")
	}
}

// mReserveID returns the next ID to use for a new m. This new m is immediately
// considered 'running' by checkdead.
//
// sched.lock must be held.
func mReserveID() int64 {
	assertLockHeld(&sched.lock)

	if sched.mnext+1 < sched.mnext {
		throw("runtime: thread ID overflow")
	}