// it, there's no point in doing the rest.
			unlock(&mheap_.lock)
			return
		}
		gcControllerCommit()
		unlock(&mheap_.lock)
	})
	return out
}

func readGOMEMLIMIT() int64 {
	p := gogetenv("GOMEMLIMIT")
	if p == "" || p == "off" {
		return maxInt64
	}
	n, ok := parseByteCount(p)
	if !ok {
		print("GOMEMLIMIT=", p, "\n")

	// Initialize GC pacer state.
	// Use the environment variable GOGC for the initial gcPercent value.
	// Use the environment variable GOMEMLIMIT for the initial memoryLimit value.
	gcController.init(readGOGC(), readGOMEMLIMIT())

	work.startSema = 1
	work.markDoneSema = 1
	lockInit(&work.sweepWaiters.lock, lockRankSweepWaiters)
	lockInit(&work.assistQueue.lock, lockRankAssistQueue)
	lockInit(&work.wbufSpans.lock, lockRankWbufSpans)