Messages in this thread |  | | | Date | Fri, 22 May 2009 22:43:00 +0200 | | From | Samuel Thibault <> | | Subject | Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic |
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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?
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