On 11/11/2013 11:58 AM, Ingo Molnar wrote: >> >> Use the i8254 if and only if nothing else is available, it isn't safe to >> touch on some newer systems. > > I concur - the i8254 is probably also a low entry source, given that this > all runs early bootup. > Well, it is a 16-bit 1.19318 MHz counter so at least on older systems it is likely to provide at least a modicum on entropy. On systems with a TSC it is likely to be redundant with the TSC. > In any case there's no excuse for not mixing RDRAND and RDTSC entropy. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html