for l := 0; l < summaryLevels; l++ {
			sysFreeOS(unsafe.Pointer(&p.summary[l][0]), uintptr(cap(p.summary[l]))*pallocSumBytes)
		}
	} else {
		resSize := uintptr(0)
		for _, s := range p.summary {
			resSize += uintptr(cap(s)) * pallocSumBytes
		}
		sysFreeOS(unsafe.Pointer(&p.summary[0][0]), alignUp(resSize, physPageSize))
	}

	// Free extra data structures.