if p.lostExtra > 0 {
		hdr := [1]uint64{p.lostExtra}
		lostStk := [2]uintptr{
			abi.FuncPCABIInternal(_LostExternalCode) + sys.PCQuantum,
			abi.FuncPCABIInternal(_ExternalCode) + sys.PCQuantum,
		}
		p.log.write(nil, 0, hdr[:], lostStk[:])
		p.lostExtra = 0
	}

	if p.lostAtomic > 0 {
		hdr := [1]uint64{p.lostAtomic}
		lostStk := [2]uintptr{

	rate := int64(atomic.Load64(&mutexprofilerate))
	saveBlockEventStack(cycles, rate, prof.stack[:nstk], mutexProfile)
	if lost > 0 {
		lostStk := [...]uintptr{
			logicalStackSentinel,
			abi.FuncPCABIInternal(_LostContendedRuntimeLock) + sys.PCQuantum,
		}
		saveBlockEventStack(lost, rate, lostStk[:], mutexProfile)
	}

	prof.disabled = false
	releasem(mp)
}