Re: Difference between atomic operations and memory barriers

[Noah Watkins]

> Noah Watkins wrote:
> > > So we can safely assume that pointer assignment will be done in an
> > > atomic manner?
> >
> > See the the comment above rcu_assign_pointer in
> > include/linux/rcupdate.h
>
> This comment only talks about ordering, not about atomicity.
Ahh, yeh that's true.

> Again, AFAIR the ISO C spec should explain what is going to be
> guaranteed atomic and what might not be atomic.
This seems likely. I wonder if there are any strange architectures
out there that have some insane implementation.

>

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