Re: Question about memory barriers

[Alan Stern]

On Thu, 2 Feb 2006, Roland Dreier wrote:

> Most of this is correct, except that mb() is stronger than just rmb()
> and wmb() put together.  All memory operations before the mb() will
> complete before any operations after the mb().  A better way to
> understand this is to look at the sparc64 definition:
> 
> #define mb()    \
>         membar_safe("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad")

Thanks for the explanation.  Is there any appropriate place, say in 
Documentation/, where these things could be spelled out more completely?

Alan Stern

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