Messages in this thread | | | From | Andi Kleen <> | Subject | Re: Intel Memory Ordering White Paper | Date | Sat, 8 Sep 2007 12:19:43 +0200 |
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On Friday 07 September 2007 21:57:35 Nick Piggin wrote:
> > > > Anyway, the lfence should be able to go away without so much trouble. > > > > You mean sfence? lfence in rmb is definitely needed. > > I mean lfence in smp_rmb().
One point of rmb is to stop speculative loads and I don't think we can get that without lfence.
-Andi
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