Messages in this thread | | | Date | Fri, 22 May 2009 23:59:39 +0200 | From | Andi Kleen <> | Subject | Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic |
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> > - 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.
Actually it's related to other devices; but only very few (most MMIO doesn't support atomic cycles and is uncached anyways). But there's no driver for real hardware in Linux that relies on it to my knowledge.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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