On Tue, 2010-10-26 at 21:29 -0400, John David Anglin wrote: > > - shared memory --- there is SHMLBA boundary that causes that all > mappings > > are aligned to this boundary --- it is **WRONG** in the current > kernel!!! > > It is only 4MB and should be 16MB!!! > > James has said that the max for all PA-RISC implementations is > 4 MB. The value is returned by the PDC_CACHE call. Maybe a BUG_ON is > called for. The alias boundary can be determined by the alias field > in the D_conf return value. Why is it I get blamed for everything cache related on parisc? The statement in the manuals that the equivalency modulus is 16MB was left for future expansion. However, given PA8900 is the last in the series, there is no future expansion. John Marvin (I think it was) from the HP processor group confirmed that the largest equivalency modulus for any produced parisc processor is 4MB, so that's what we use in the kernel. James -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
