From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Date: Wed, 11 Jan 2017 08:33:30 -0800 > Is there a cost in the hardware associated with doing this "ADI > checking"? For instance, instead of having this new mprotect() > interface, why not just always set TTE.mcd on all PTEs? If we did this then for every page mapped into userspace we'd have to explicitly set all of the tags to zero, otherwise we'd get TAG mismatch exceptions. That would be like clearing the every mapped anonymous page twice, or worse. -- 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
