Re: FEATURE REQUEST: Specific Processor Optimizations on x86 Architecture

From: Andi Kleen
Date: Tue Nov 18 2003 - 08:51:23 EST


Zwane Mwaikambo <zwane@xxxxxxxxxxxxxxxx> writes:

> On Mon, 27 Oct 2003, Andi Kleen wrote:
>
> > The wmb() change is not needed, unless you have an oostore CPU
> > (x86 has ordered writes by default). It probably does not hurt
> > neither though (I do it the same way on x86-64), but also doesn't
> > change anything.
>
> The original intent was to fix an SMP P5 system, it oopses otherwise under
> load.

That doesn't make any sense. P5 doesn't support SFENCE.

-Andi
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