[linux-audio-dev] lock-free ring buffer code

[Paul Davis]

>> >Also, several people have referred to the atomicity of int/pointer
>> >read/write.  This is news to me - can someone point me at the spec for this
>?
>> 
>> its an architecture-specific issue. its not true on SPARCs and on some
>> NUMA systems. it has nothing to do with a language per se.
>
>Is it really true on x86?  Being that you can do unaligned accesses just
>fine, you can certainly do cross-cacheline accesses.  Pardon the skepticism,
>but I've never heard such assertions before.  Can anyone offer me a
>specification for this?

nope. i can tell you, however, that x86 does not allow any cache
incoherency at all. but i can't point you at a spec for that either.