const runtime.gcBitsChunkBytes

4 uses

	runtime (current package)
		mheap.go#L2879: const gcBitsChunkBytes = uintptr(64 << 10)
		mheap.go#L2892: 	bits [gcBitsChunkBytes - gcBitsHeaderBytes]gcBits
		mheap.go#L3021: 		result = (*gcBitsArena)(sysAlloc(gcBitsChunkBytes, &memstats.gcMiscSys, "gc bits"))
		mheap.go#L3029: 		memclrNoHeapPointers(unsafe.Pointer(result), gcBitsChunkBytes)