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    SubjectRe: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic
    Michael S. Zick, le Fri 22 May 2009 15:32:41 -0500, a écrit :
    > On Fri May 22 2009, Samuel Thibault wrote:
    > > Michael S. Zick, le Fri 22 May 2009 14:53:39 -0500, a écrit :
    > > > Ref: http://developer.intel.com/Assets/PDF/manual/253666.pdf
    > > > Manual page: 3-590 PDF page: 638
    > > > Summary: Processors prior to P-4 can take an interrupt between
    > > > the read cycle and the write cycle. Which is why opcode 0xF0 exists.
    > >
    > > Where do you see page 638/639 talking about interrupts? It talks about
    > > multi-processor machines.
    >
    > No - it talks about "exclusive memory access"

    Right, that's still not interrupts.

    > - You got bus master DMA in your test machine?

    That's not related to the LOCK_PREFIX concern, which is about the
    processor only, not interaction with other devices.

    > Look people, I just reported what I found from testing -

    What did you test, precisely?

    Samuel
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