According to my notes, 644 isn't a valid CPU for reliable MP operation.
The earliest Athlon rated 'smp safe' is model 6 stepping 0.
Anyone with anything earlier that isn't having problems is
getting 'lucky'.
Dave.
-- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs - 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/