> I don't see why we have to worry about cache corruption in the case at > hand. Write-combining is needed to map io (typically pci-mem regions) > which are never mapped cachable anywhere, including in the linear map.
If we WC them using PAT then there would be a UC<->WC conflict with the direct mapping and possibly others. That's already undefined and not allowed. After some very bad experiences in the past I'm not going to take chances on this. We really need to keep all possible mappings synchronized. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
