Re: [PATCH] Document Linux's memory barriers [try #2]

Linus Torvalds
2006-03-09T00:54:35Z

On Thu, 9 Mar 2006, Paul Mackerras wrote:
>
> If you ask me, the need for mmiowb on some platforms merely shows that
> those platforms' implementations of spinlocks and read*/write* are
> buggy...

You could also state that same as

"If you ask me, the need for mmiowb on some platforms merely shows
that those platforms perform like a bat out of hell, and I think
they should be slower"

because the fact is, x86 memory barrier rules are just about optimal for
performance.

Linus