const runtime.gcBitsChunkBytes

4 uses

	runtime (current package)
		mheap.go#L2869: const gcBitsChunkBytes = uintptr(64 << 10)
		mheap.go#L2882: 	bits [gcBitsChunkBytes - gcBitsHeaderBytes]gcBits
		mheap.go#L3011: 		result = (*gcBitsArena)(sysAlloc(gcBitsChunkBytes, &memstats.gcMiscSys, "gc bits"))
		mheap.go#L3019: 		memclrNoHeapPointers(unsafe.Pointer(result), gcBitsChunkBytes)