Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH] mm: PageLRU can be non-atomic bit operation | Date | Wed, 25 Apr 2007 10:59:24 +0200 |
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> This seems to imply that we need the lock prefix even when updating > different bits within the same long (not just the same byte). Is this > interpretation correct?
Yes, that is what I said. The consistency applies to loads/stores (so e.g. for 128bit SSE2 load/stores too), not bytes.
The current IA32 manuals have a more detailed description of the rules in volume 3
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