const runtime.logPallocChunkBytes

3 uses

	runtime (current package)
		mpagealloc.go#L61: 	logPallocChunkBytes = logPallocChunkPages + pageShift
		mpagealloc.go#L75: 	summaryL0Bits    = heapAddrBits - logPallocChunkBytes - (summaryLevels-1)*summaryLevelBits
		mpagealloc.go#L82: 	pallocChunksL2Bits  = heapAddrBits - logPallocChunkBytes - pallocChunksL1Bits