On Mon, Dec 13, 2010 at 07:25:05PM +1100, Nick Piggin wrote: >On Mon, Dec 13, 2010 at 6:29 PM, J. R. Okajima <hooanon05@xxxxxxxxxxx> wrote: >> But is the "rep cmp has quite a long latency" issue generic for all x86 >> architecture, or Westmere system specific? > >I don't believe it is Westmere specific. Intel and AMD have >been improving these instructions in the past few years, so >Westmere is probably as good or better than any. > >That said, rep cmp may not be as heavily optimized as the >set and copy string instructions. > >In short, I think the change should be suitable for all x86 CPUs, >but I would like to hear more opinions or see numbers for other >cores. > How about other arch? If this is only for x86, shouldn't it be protected by CONFIG_X86? Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
