Re: I/O memory barriers vs SMP memory barriers

[David Howells]

Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote:

> Hrm... I'm not sure I like the io_* name, I think it's even more
> confusing, people will never know when to use what ...

I'd've thought it more obvious, but given there are several types of I/O, some
of which might require different barriering to others, I can see your point.

However, I think mb() unadorned is also confusing.

> Maybe we should dig out again my attempt at properly defining semantics
> of IO accessors and related barriers and extend it to include CPU vs.
> DMA barriers.

That could be useful.

David
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