Re: frlock and barrier discussion

Alan Cox (alan@lxorguk.ukuu.org.uk)
30 Jan 2003 22:32:45 +0000

On Thu, 2003-01-30 at 18:20, Manfred Spraul wrote:
> If I understand the Intel documentation correctly, then i386 doesn't need them:
> "Writes by a single processor are observed in the same order by all processors"

See the PPro errata. There are some constraints on this in the real
world. You may need locked ops on the ppro and earlier cpus while
being able to do it the fast way on PII and higher

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