> me too. That's the whole basis for readX_relaxed() and its cohorts: we > make our weirdest machines (like altix) conform to the x86 norm. Then > where it really kills us we introduce additional semantics to selected > drivers that enable us to recover I/O speed on the abnormal platforms. Except as I pointed out before, Altix doesn't conform to the norm and many (most?) drivers are missing mmiowb()s that are needed for Altix. Just no one has plugged most devices into an Altix (or haven't stressed the driver in a way that exposes problems of IO ordering between CPUs). It would be a great thing to use the powerpc trick of setting a flag that is tested by spin_unlock()/mutex_unlock() and automatically doing the mmiowb() if needed, and then killing off mmiowb() entirely. - R. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
