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    SubjectRe: HELP: Is writeq an atomic operation??
    Moore, Eric wrote:
    > On Friday, May 02, 2008 4:50 PM, Andi Kleen wrote:
    >>> Here is a trace from pci express analyzer. I'm sending
    >> With what CPU/chipset was that?
    >>
    >
    > I'm developing sas driver for next generation controllers. They should
    > work at least on x86, x86_64, ia64, and ppc64. The host I was using for
    > gathering that trace was x86_64 Intel Platform. Here is the lspci
    > output:

    I doubt the CPU was to blame. Probably the chipset split it up for some
    reason. Did you check the data sheets?

    At the CPU level writeq is simply a 64bit store on x86-64 Linux.

    -Andi


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