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On Sun, Dec 14, 2003 at 05:26:23PM +0100, Andi Kleen wrote: > Arjan van de Ven <arjanv@redhat.com> writes: > > > > also keep in mind that current x86 processors all will internally > > optimize out the lock prefix in UP mode or when the cacheline is owned > > exclusive.... If HT matters here let the cpu optimize it out..... > > Are you sure they optimize it out in UP mode? IMHO this would break > device drivers that use locked cycles to communicate with bus master > devices (and which are not necessarily mapped uncachable/write combining) uncachable regions are different obviously.... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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