On Sunday 09 September 2007 03:48, Nick Piggin wrote: > There is some suggestion in the source code that non-temporal stores > (movntq) are weakly ordered. But AFAIKS from the documents, it is ordered > when operating on wb memory. What's the situation there?
Sorry, it looks from the AMD document like nontemporal stores to wb memory can go out of order. It is a bit hard to decipher what the types mean. If this is the case, we can either retain the sfence in smp_wmb(), or noop it, and put explicit sfences around any place that performs nontemporal stores... Anyway, the lfence should be able to go away without so much trouble. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
