systemstack(func() {
		i := gp.m.locksHeldLen
		if i >= len(gp.m.locksHeld) {
			throw("too many locks held concurrently for rank checking")
		}
		gp.m.locksHeld[i].rank = rank
		gp.m.locksHeld[i].lockAddr = uintptr(unsafe.Pointer(l))
		gp.m.locksHeldLen++

		// i is the index of the lock being acquired
		if i > 0 {
			checkRanks(gp, gp.m.locksHeld[i-1].rank, rank)
		}
		lock2(l)
	})
}

			UID:    mustGetUUID(),
			Owner:  owners[i%len(owners)],
			Quorum: 2,
		}
		lris = append(lris, lri)
		locksHeld[resource] = append(locksHeld[resource], lri)
		// concurrent read lock, same resource different uid
		lri.UID = mustGetUUID()
		lris = append(lris, lri)
		locksHeld[resource] = append(locksHeld[resource], lri)
	}

	var peerLocks []*PeerLocks
	for _, owner := range owners {

                     TF_Tensor* dest),
    tensorflow::Var* var, bool lock_held = false) {
  auto* context = reinterpret_cast<::tensorflow::OpKernelContext*>(ctx);
  if (var->copy_on_read_mode.load()) {
    return absl::OkStatus();
  }

  std::optional<mutex_lock> ml;
  if (!lock_held) {
    ml.emplace(*var->mu());
  }

    absl::Span<VariableInfo const> variable_args,
    absl::flat_hash_map<int, const VariableInfo*>& variable_info_lookup) {
  for (const VariableInfo& info : variable_args) {
    if (!(!info.var() || info.lock_held() || info.shared_lock_held())) {
      return errors::Internal(
          "Need to hold the lock on resource variables "
          "before calling BuildXlaCompilerArguments");
    }

  TF_RETURN_IF_ERROR(
      CreateVariableInfoLookup(variable_args, variable_info_lookup));

  for (const VariableInfo& info : variable_args) {
    TF_RET_CHECK(!info.var() || info.lock_held() || info.shared_lock_held())
        << "Need to hold the lock on resource variables "
           "before calling BuildXlaCompilerArguments";
    variable_info_lookup.emplace(info.index(), &info);
  }

	mp := acquirem()
	if !lockheld {
		lock(&sched.lock)
	}
	if pp == nil {
		if spinning {
			// TODO(prattmic): All remaining calls to this function
			// with _p_ == nil could be cleaned up to find a P
			// before calling startm.
			throw("startm: P required for spinning=true")
		}
		pp, _ = pidleget(0)
		if pp == nil {
			if !lockheld {
				unlock(&sched.lock)
			}

	pcvalueCache pcvalueCache

	dlogPerM

	mOS

	chacha8   chacha8rand.State
	cheaprand uint64

	// Up to 10 locks held by this m, maintained by the lock ranking code.
	locksHeldLen int
	locksHeld    [10]heldLockInfo
}

type p struct {
	id          int32
	status      uint32 // one of pidle/prunning/...
	link        puintptr
	schedtick   uint32     // incremented on every scheduler call