Messages in this thread | | | From | Nick Piggin <> | Subject | Re: Intel Memory Ordering White Paper | Date | Sun, 9 Sep 2007 03:34:27 +1000 |
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On Saturday 08 September 2007 09:20, Linus Torvalds wrote: > On Sat, 8 Sep 2007, Nick Piggin wrote: > > So, can we finally noop smp_rmb and smp_wmb on x86? > > Did AMD already release their version? If so, we should probably add a > commit that does that in somewhat early 2.6.24 rc, and add the pointers to > the whitepapers in the commit message.
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24593.pdf
AMD64 Architecture Programmer's Manual Volume 2: System Programming section 7.2: Multiprocessor Memory Access Ordering, a paragraph on the first page says
"Loads do not pass previous loads (loads are not re-ordered). Stores do not pass previous stores (stores are not re-ordered)"
So, yes, it should be easy to do. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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